{"id":30013,"date":"2026-07-24T14:43:45","date_gmt":"2026-07-24T12:43:45","guid":{"rendered":"https:\/\/perseus.de\/advertencia-critica-para-usuarios-de-sharepoint-la-vulnerabilidad-esta-siendo-atacada-activamente\/"},"modified":"2026-08-10T10:19:03","modified_gmt":"2026-08-10T08:19:03","slug":"advertencia-critica-para-usuarios-de-sharepoint-la-vulnerabilidad-esta-siendo-atacada-activamente","status":"publish","type":"post","link":"https:\/\/perseus.de\/es\/advertencia-critica-para-usuarios-de-sharepoint-la-vulnerabilidad-esta-siendo-atacada-activamente\/","title":{"rendered":"Advertencia cr\u00edtica para usuarios de SharePoint: La vulnerabilidad est\u00e1 siendo atacada activamente"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30013\" class=\"elementor elementor-30013 elementor-28864\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dcf4ec4 e-flex e-con-boxed e-con e-parent\" data-id=\"dcf4ec4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e1db58c elementor-widget elementor-widget-image\" data-id=\"e1db58c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"200\" src=\"https:\/\/perseus.de\/wp-content\/uploads\/2026\/07\/Coverbild-Gefahrenwarnung_ES-1024x256.png\" class=\"attachment-large size-large wp-image-30045\" alt=\"En caso de que se detecte un patr\u00f3n de ataque actual o una vulnerabilidad de seguridad, Perseus env\u00eda correos electr\u00f3nicos de alerta con medidas concretas para contrarrestarlo.\" srcset=\"https:\/\/perseus.de\/wp-content\/uploads\/2026\/07\/Coverbild-Gefahrenwarnung_ES-1024x256.png 1024w, https:\/\/perseus.de\/wp-content\/uploads\/2026\/07\/Coverbild-Gefahrenwarnung_ES-300x75.png 300w, https:\/\/perseus.de\/wp-content\/uploads\/2026\/07\/Coverbild-Gefahrenwarnung_ES-768x192.png 768w, https:\/\/perseus.de\/wp-content\/uploads\/2026\/07\/Coverbild-Gefahrenwarnung_ES.png 1200w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1258a43 e-flex e-con-boxed e-con e-parent\" data-id=\"1258a43\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2de4e88 e-con-full e-flex e-con e-child\" data-id=\"2de4e88\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4982c80 elementor-widget elementor-widget-text-editor\" data-id=\"4982c80\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h6>24.07.2026<\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8348bc5 elementor-widget elementor-widget-heading\" data-id=\"8348bc5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Advertencia cr\u00edtica para usuarios de SharePoint: La vulnerabilidad est\u00e1 siendo atacada activamente  \n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eb03842 e-con-full e-flex e-con e-child\" data-id=\"eb03842\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91d0988 elementor-widget elementor-widget-text-editor\" data-id=\"91d0988\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p> <\/p>\n<p>Se <span style=\"font-weight: 400\"><\/span><b> ha identificado una vulnerabilidad grave en Microsoft SharePoint Server<\/b><span style=\"font-weight: 400\"> que permite a los atacantes tomar el control de un servidor con relativamente poco esfuerzo. <\/span> <\/p>\n<p> <\/p>\n<p><span style=\"font-weight: 400\">Un c\u00f3digo de ataque correspondiente lleva unos d\u00edas disponible p\u00fablicamente, y los investigadores de seguridad ya est\u00e1n registrando oleadas activas de ataques.  <\/span><\/p>\n<p><span style=\"font-weight: 400\">Por favor, ten en cuenta: adaptar la actualizaci\u00f3n por s\u00ed sola no es suficiente en este caso; las empresas afectadas deben <\/span><b>actuar con poca antelaci\u00f3n. <\/b> <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ceb0f40 e-flex e-con-boxed e-con e-parent\" data-id=\"ceb0f40\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ffbdc12 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"ffbdc12\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-02dd0e9 e-flex e-con-boxed e-con e-parent\" data-id=\"02dd0e9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-16d621d e-con-full e-flex e-con e-child\" data-id=\"16d621d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-89904c7 elementor-widget elementor-widget-text-editor\" data-id=\"89904c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>\u00bfQu\u00e9 ha pasado?<\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fae461d e-con-full e-flex e-con e-child\" data-id=\"fae461d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f04793 elementor-widget elementor-widget-text-editor\" data-id=\"0f04793\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">La vulnerabilidad lleva el identificador CVE-2026-50522. Permiten a los atacantes ejecutar de forma remota c\u00f3digo malicioso en un servidor de SharePoint. En el peor de los casos, basta con una sola solicitud preparada a trav\u00e9s de Internet, sin ninguna cuenta de usuario ni inicio de sesi\u00f3n.  <\/span><\/p>\n<p><span style=\"font-weight: 400\">Microsoft ya cerr\u00f3 la vulnerabilidad el 14 de julio de 2026 con una actualizaci\u00f3n de seguridad. Sin embargo, desde el 20 de julio, un c\u00f3digo de ataque terminado est\u00e1 disponible p\u00fablicamente, y desde entonces los investigadores de seguridad han estado observando intentos activos de ataque en servidores sin parchear. <\/span><\/p>\n<p><span style=\"font-weight: 400\">Particularmente importante: los atacantes intentan capturar las llamadas <\/span><b>claves de m\u00e1quina<\/b><span style=\"font-weight: 400\">, claves digitales con las que pueden obtener acceso permanente al servidor incluso tras una actualizaci\u00f3n posterior. Por lo tanto, instalar la actualizaci\u00f3n por s\u00ed sola no es suficiente para proteger los servidores que ya han sido afectados.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-54c68ef e-flex e-con-boxed e-con e-parent\" data-id=\"54c68ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-96849ac elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"96849ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-174b215 e-flex e-con-boxed e-con e-parent\" data-id=\"174b215\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-e560a6b e-con-full e-flex e-con e-child\" data-id=\"e560a6b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-013b67e elementor-widget elementor-widget-text-editor\" data-id=\"013b67e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>\u00bfC\u00f3mo funciona el ataque?  <\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a72ed48 e-con-full e-flex e-con e-child\" data-id=\"a72ed48\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-db8754f elementor-widget elementor-widget-text-editor\" data-id=\"db8754f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">El ataque est\u00e1 dirigido espec\u00edficamente a la funci\u00f3n de inicio de sesi\u00f3n de los servidores SharePoint accesibles desde Internet. En este caso, los atacantes env\u00edan una solicitud especialmente dise\u00f1ada al servidor, que este procesa incorrectamente, ejecutando el c\u00f3digo inyectado. Si este primer paso tiene \u00e9xito, los atacantes obtienen las claves de la m\u00e1quina del servidor en un segundo paso y as\u00ed aseguran un acceso permanente que sobrevivir\u00e1 a una actualizaci\u00f3n posterior. Dado que no se requiere acceso de usuario para este proceso, todos los servidores no parcheados accesibles desde Internet est\u00e1n en riesgo.     <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-54465d1 e-flex e-con-boxed e-con e-parent\" data-id=\"54465d1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d02be9e elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"d02be9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d3f9227 e-flex e-con-boxed e-con e-parent\" data-id=\"d3f9227\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6059711 e-con-full e-flex e-con e-child\" data-id=\"6059711\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-26eea72 elementor-widget elementor-widget-text-editor\" data-id=\"26eea72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>\u00bfQu\u00e9 se ve afectado? <\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-724b6c6 e-con-full e-flex e-con e-child\" data-id=\"724b6c6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f0c2fb4 elementor-widget elementor-widget-text-editor\" data-id=\"f0c2fb4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">La vulnerabilidad afecta solo a servidores SharePoint autooperados (\u00abon-premises\u00bb):<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">SharePoint Enterprise Server 2016<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">SharePoint Server 2019<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Edici\u00f3n de suscripci\u00f3n de SharePoint Server<\/span><\/li>\n<\/ul>\n<p> <\/p>\n<p><b>SharePoint Online (la variante en la nube dentro de Microsoft 365) no se ve afectado.  <\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9e25b00 e-flex e-con-boxed e-con e-parent\" data-id=\"9e25b00\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-67b2d4e elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"67b2d4e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c28550e e-flex e-con-boxed e-con e-parent\" data-id=\"c28550e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-b5ac00b e-con-full e-flex e-con e-child\" data-id=\"b5ac00b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4467aca elementor-widget elementor-widget-text-editor\" data-id=\"4467aca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>\u00bfC\u00f3mo puedo protegerme? <\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-990ca5f e-con-full e-flex e-con e-child\" data-id=\"990ca5f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-56e453f elementor-widget elementor-widget-text-editor\" data-id=\"56e453f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Recomendamos que las empresas que utilicen las versiones afectadas tomen las siguientes medidas:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400\"><b>Instala la actualizaci\u00f3n de seguridad.<\/b><span style=\"font-weight: 400\"> Aseg\u00farate de que la actualizaci\u00f3n del 14 de julio de 2026 <\/span> est\u00e9 instalada en <i><span style=\"font-weight: 400\">todos los<\/span><\/i><span style=\"font-weight: 400\"> servidores de tus entornos SharePoint, no solo en el servidor accesible desde fuera. Si operas varios servidores SharePoint en una red (\u00abgranja\u00bb), cada uno debe actualizarse, de lo contrario el hueco permanecer\u00e1 sobre los servidores sin parchear.<\/span><\/li>\n<li style=\"font-weight: 400\"><b>Renovar las claves de acceso (claves de m\u00e1quina).<\/b><span style=\"font-weight: 400\"> Estas claves son utilizadas por SharePoint para proteger las sesiones. Si ya fueron robados antes del parcheo, siguen siendo v\u00e1lidos tras la actualizaci\u00f3n y siguen permitiendo el acceso. Tu proveedor o departamento de servicios de TI puede regenerar y distribuir estas claves a trav\u00e9s de SharePoint Central Administration o PowerShell. Si tienes dudas, pregunta espec\u00edficamente si este paso ya se ha dado; se pasa f\u00e1cilmente por alto al aplicar parches.<\/span><\/li>\n<li style=\"font-weight: 400\"><b>Restringir el acceso desde fuera.<\/b><span style=\"font-weight: 400\">  Mientras la actualizaci\u00f3n a\u00fan no se haya instalado en todos los servidores, el acceso a las p\u00e1ginas de inicio de sesi\u00f3n de SharePoint deber\u00eda restringirse tanto como sea posible desde fuera, por ejemplo a trav\u00e9s del cortafuegos o una VPN, para que solo puedan acceder las direcciones conocidas y confiables.<\/span><\/li>\n<li style=\"font-weight: 400\"><b>Haz que revisen las anomal\u00edas.<\/b><span style=\"font-weight: 400\"> Haz que tu proveedor de servicios inform\u00e1ticos o departamento de TI revise los registros de acceso de los servidores SharePoint correspondientes al 17 de julio de 2026. Presta especial atenci\u00f3n a: un n\u00famero inusualmente grande o de formas inusuales, intentos de inicio de sesi\u00f3n desde direcciones IP desconocidas o extranjeras fuera del horario habitual, as\u00ed como cuentas de usuario nuevas o accesos administrativos que nadie en el equipo ha iniciado. Tambi\u00e9n es \u00fatil compararlo con las instrucciones del fabricante para las caracter\u00edsticas conocidas de ataque (indicadores de compromiso) por parte de un proveedor de servicios de seguridad inform\u00e1tica si t\u00fa mismo no tienes claro exactamente qu\u00e9 buscar.<\/span><\/li>\n<\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a2790c7 e-flex e-con-boxed e-con e-parent\" data-id=\"a2790c7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d4feb2c elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"d4feb2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7faf510 e-flex e-con-boxed e-con e-parent\" data-id=\"7faf510\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-9a087a2 e-con-full e-flex e-con e-child\" data-id=\"9a087a2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4a4eba5 elementor-widget elementor-widget-text-editor\" data-id=\"4a4eba5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Conclusi\u00f3n  <\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f63aea7 e-con-full e-flex e-con e-child\" data-id=\"f63aea7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e249ee4 elementor-widget elementor-widget-text-editor\" data-id=\"e249ee4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">CVE-2026-50522 es un ejemplo de lo r\u00e1pido que una vulnerabilidad cerrada puede volver a convertirse en un riesgo agudo: un parche disponible solo protege si se instala en todos los \u00e1mbitos, y aun as\u00ed, el riesgo de que las claves de acceso ya hayan sido robadas antes de la actualizaci\u00f3n.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Por tanto, una prioridad clara es importante, especialmente para las pymes que no cuentan con un gran departamento interno de seguridad inform\u00e1tica: instalar actualizaciones, rotar las claves de la m\u00e1quina, restringir el acceso externo y que sus propios sistemas sean revisados en busca de anomal\u00edas. Quienes implementen estas medidas ahora no solo cerrar\u00e1n la brecha actual, sino que tambi\u00e9n reducir\u00e1n el riesgo de verse afectados por ataques de seguimiento en las pr\u00f3ximas semanas; los servidores SharePoint est\u00e1n siendo cada vez m\u00e1s objetivo de los atacantes. <\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Si tienes alguna pregunta sobre la implementaci\u00f3n, no dudes en ponerte en contacto con nosotros.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Tu equipo Perseus<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8530d6c e-flex e-con-boxed e-con e-parent\" data-id=\"8530d6c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3bbb54c elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"3bbb54c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2d97c9 elementor-widget elementor-widget-text-editor\" data-id=\"f2d97c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><i>\u00bfQuieres mantenerte informado sobre las amenazas actuales y vulnerabilidades de seguridad?<\/i><\/p>\n<p><i>Suscr\u00edbete a nuestro bolet\u00edn y recibe advertencias importantes, recomendaciones de acci\u00f3n y evaluaciones de los riesgos cibern\u00e9ticos actuales directamente en tu bandeja de entrada.<\/i><\/p>\n<p> <\/p>\n<p><b>Fuentes y m\u00e1s informaci\u00f3n<\/b><\/p>\n<ul>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Gu\u00eda de Actualizaciones de Seguridad de Microsoft, CVE-2026-50522: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2026-50522\">https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2026-50522<\/a><\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">SOCRadar, \u00abCVE-2026-50522 PoC alimenta ataques a SharePoint\u00bb: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/socradar.io\/blog\/cve-2026-50522-poc-fuels-sharepoint-attacks\/\">https:\/\/socradar.io\/blog\/cve-2026-50522-poc-fuels-sharepoint-attacks\/<\/a><\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">The Hacker News, \u00abCritical SharePoint RCE CVE-2026-50522 Under Active Exploitation After Public PoC\u00bb: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/thehackernews.com\/2026\/07\/critical-sharepoint-rce-cve-2026-50522.html\">https:\/\/thehackernews.com\/2026\/07\/critical-sharepoint-rce-cve-2026-50522.html<\/a><\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Ayuda a la seguridad de la red, \u00abOtro RCE de SharePoint explotado: Parchear y luego rotar las claves de tu m\u00e1quina\u00bb: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/www.helpnetsecurity.com\/2026\/07\/22\/sharepoint-cve-2026-50522-exploited\/\">https:\/\/www.helpnetsecurity.com\/2026\/07\/22\/sharepoint-cve-2026-50522-exploited\/<\/a><\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">BleepingComputer, \u00abFallo cr\u00edtico de SharePoint RCE explotado para robar claves de m\u00e1quina\u00bb: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/critical-sharepoint-rce-flaw-exploited-to-steal-machine-keys\/\">https:\/\/www.bleepingcomputer.com\/news\/security\/critical-sharepoint-rce-flaw-exploited-to-steal-machine-keys\/<\/a><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9f86355 e-flex e-con-boxed e-con e-parent\" data-id=\"9f86355\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dd90633 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"dd90633\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Se ha identificado una vulnerabilidad grave en Microsoft SharePoint Server que permite a los atacantes tomar el control de un servidor con relativamente poco esfuerzo.  <\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-30013","post","type-post","status-publish","format-standard","hentry","category-gefahrenwarnung"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Advertencia cr\u00edtica para usuarios de SharePoint: La vulnerabilidad est\u00e1 siendo atacada activamente - Perseus Technologies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/perseus.de\/kritische-warnung-an-sharepoint-nutzer-sicherheitsluecke-wird-aktiv-angegriffen\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" 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