{"id":5997,"date":"2026-09-28T10:44:32","date_gmt":"2026-09-28T15:44:32","guid":{"rendered":"https:\/\/cert.pa\/?p=5997"},"modified":"2026-09-28T10:44:33","modified_gmt":"2026-09-28T15:44:33","slug":"csirt-panama-aviso-2026-sep-28-vulnerabilidad-critica-en-microsoft-sharepoint-que-permite-ejecucion-remota-de-codigo-cve-2026-65660","status":"publish","type":"post","link":"https:\/\/cert.pa\/?p=5997","title":{"rendered":"CSIRT Panam\u00e1 Aviso 2026-sep-28: Vulnerabilidad Cr\u00edtica en Microsoft SharePoint que permite ejecuci\u00f3n remota de c\u00f3digo \u2014 CVE-2026-65660"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Fecha de emisi\u00f3n:<\/strong> 28 de septiembre de 2026<br><strong>CVE ID:<\/strong> CVE-2026-65660<br><strong>Severidad:<\/strong> CR\u00cdTICA \u2014 CVSS 3.1: 8.8<br><strong>Vector CVSS:<\/strong> CVSS:3.1\/AV:N\/AC:L\/PR:L\/UI:N\/S:U\/C:H\/I:H\/A:H<br><strong>Tipo de vulnerabilidad:<\/strong> CWE-94: Inyecci\u00f3n de c\u00f3digo<br><strong>Producto afectado:<\/strong> Microsoft SharePoint<br><strong>Explotaci\u00f3n activa:<\/strong> S\u00ed \u2014 Incluida en el cat\u00e1logo CISA KEV (Known Exploited Vulnerabilities) desde el 25 de septiembre de 2026<br><strong>Fuente:<\/strong> NVD \/ CISA \/ SecurityWeek \/ The Hacker News \/ Canadian Centre for Cyber Security<br><strong>Clasificaci\u00f3n TLP:<\/strong> TLP:CLEAR (Difusi\u00f3n p\u00fablica)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>I. Descripci\u00f3n<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Se ha identificado una vulnerabilidad de inyecci\u00f3n de c\u00f3digo en Microsoft SharePoint, registrada como CVE-2026-65660 y calificada con 8.8 de 10 en la escala CVSS 3.1. Un atacante que la aproveche podr\u00eda lograr la ejecuci\u00f3n remota de c\u00f3digo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El 25 de septiembre de 2026, la Agencia de Ciberseguridad y Seguridad de Infraestructura de Estados Unidos (CISA) la incorpor\u00f3 a su cat\u00e1logo de Known Exploited Vulnerabilities (KEV), lo que confirma que est\u00e1 siendo explotada activamente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Descripci\u00f3n t\u00e9cnica publicada en NVD (en ingl\u00e9s): \u00abImproper control of generation of code (&#8216;code injection&#8217;) in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.\u00bb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>II. Productos Afectados<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Producto<\/th><th class=\"has-text-align-left\" data-align=\"left\">Versiones afectadas<\/th><th class=\"has-text-align-left\" data-align=\"left\">Versi\u00f3n corregida<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Microsoft SharePoint Server<\/td><td class=\"has-text-align-left\" data-align=\"left\">Anteriores a 16.0.19725.20522<\/td><td class=\"has-text-align-left\" data-align=\"left\">16.0.19725.20522 o superior<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Microsoft SharePoint Server<\/td><td class=\"has-text-align-left\" data-align=\"left\">2016<\/td><td class=\"has-text-align-left\" data-align=\"left\">Aplicar la actualizaci\u00f3n del fabricante<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Microsoft SharePoint Server<\/td><td class=\"has-text-align-left\" data-align=\"left\">2019<\/td><td class=\"has-text-align-left\" data-align=\"left\">Aplicar la actualizaci\u00f3n del fabricante<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>III. Acciones Requeridas<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Actualizar inmediatamente<\/strong><br>Actualizar Microsoft SharePoint a la versi\u00f3n 16.0.19725.20522 o superior, seg\u00fan la rama instalada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Mitigar inmediatamente si no es posible parchear<\/strong><br>Mientras se realiza la actualizaci\u00f3n, restringir el acceso desde Internet a la interfaz o servicio afectado, permitiendo \u00fanicamente las direcciones de confianza que lo necesiten, y aplicar las mitigaciones indicadas por el fabricante.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Verificar posible compromiso<\/strong><br>El parche cierra el vector de explotaci\u00f3n, pero no elimina un acceso que el atacante ya haya obtenido. Revisar los registros y el sistema en busca de actividad inusual desde antes de la actualizaci\u00f3n (cuentas nuevas, archivos o procesos desconocidos, conexiones salientes no habituales) y reportar cualquier hallazgo a incidentes@cert.pa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>IV. Referencias<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Microsoft. Aviso de seguridad. <a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2026-65660\">https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2026-65660<\/a><\/li>\n\n\n\n<li>blog.previdian.com. An\u00e1lisis y mitigaci\u00f3n. <a href=\"https:\/\/blog.previdian.com\/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts\/\">https:\/\/blog.previdian.com\/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts\/<\/a><\/li>\n\n\n\n<li>National Institute of Standards and Technology (NIST). National Vulnerability Database: CVE-2026-65660. <a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-65660\">https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-65660<\/a><\/li>\n\n\n\n<li>CISA. Known Exploited Vulnerabilities Catalog. <a href=\"https:\/\/www.cisa.gov\/known-exploited-vulnerabilities-catalog\">https:\/\/www.cisa.gov\/known-exploited-vulnerabilities-catalog<\/a><\/li>\n\n\n\n<li>SecurityWeek. Microsoft SharePoint Flaw CVE-2026-65660 Now Exploited in Attacks. <a href=\"https:\/\/www.securityweek.com\/microsoft-sharepoint-flaw-cve-2026-65660-now-exploited-in-attacks\/\">https:\/\/www.securityweek.com\/microsoft-sharepoint-flaw-cve-2026-65660-now-exploited-in-attacks\/<\/a><\/li>\n\n\n\n<li>The Hacker News. SharePoint RCE and MikroTik RouterOS Flaws Actively Exploited in the Wild. <a href=\"https:\/\/thehackernews.com\/2026\/09\/sharepoint-rce-and-mikrotik-routeros.html\">https:\/\/thehackernews.com\/2026\/09\/sharepoint-rce-and-mikrotik-routeros.html<\/a><\/li>\n\n\n\n<li>Canadian Centre for Cyber Security. AL26-023 &#8211; Vulnerability Impacting Microsoft SharePoint Server &#8211; CVE-2026-65660. <a href=\"https:\/\/cyber.gc.ca\/en\/alerts-advisories\/al26-023-vulnerability-impacting-microsoft-sharepoint-server-cve-2026-65660\">https:\/\/cyber.gc.ca\/en\/alerts-advisories\/al26-023-vulnerability-impacting-microsoft-sharepoint-server-cve-2026-65660<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V. Informaci\u00f3n de Contacto<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CSIRT PANAMA \u00b7 Computer Security Incident Response Team<br>Autoridad Nacional para la Innovaci\u00f3n Gubernamental<br>E-Mail: incidentes@cert.pa \u00b7 info@cert.pa<br>Phone: +507 520-CERT (2378) \u00b7 Web: https:\/\/cert.pa \u00b7 X: @CSIRTPanama \u00b7 Key ID: 16F2B124<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fecha de emisi\u00f3n: 28 de septiembre de 2026CVE ID: CVE-2026-65660Severidad: CR\u00cdTICA \u2014 CVSS 3.1: 8.8Vector CVSS: CVSS:3.1\/AV:N\/AC:L\/PR:L\/UI:N\/S:U\/C:H\/I:H\/A:HTipo de vulnerabilidad: CWE-94: [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":5998,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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