{"id":115179,"date":"2026-10-26T15:18:26","date_gmt":"2026-10-26T14:18:26","guid":{"rendered":"https:\/\/blog.mailfence.com\/vulnerabilidad-php2shell-tu-cuenta-de-mailfence-esta-a-salvo\/"},"modified":"2026-10-27T08:55:16","modified_gmt":"2026-10-27T07:55:16","slug":"vulnerabilidad-php2shell","status":"publish","type":"post","link":"https:\/\/blog.mailfence.com\/es\/vulnerabilidad-php2shell\/","title":{"rendered":"Vulnerabilidad PHP2Shell: su cuenta de Mailfence est\u00e1 protegida"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" id=\"h-\">La semana pasada, dos vulnerabilidades cr\u00edticas de PHP sacudieron Internet. Conocidas como \u00abPHP2Shell\u00bb, las vulnerabilidades \u00abCVE-2026-109618\u00bb y \u00abCVE-2026-109619\u00bb permiten a los atacantes ejecutar c\u00f3digo en servidores web sin necesidad de iniciar sesi\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si ha visto las noticias, probablemente se pregunte si su correo electr\u00f3nico est\u00e1 a salvo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Su cuenta de Mailfence no se ha visto afectada.<\/strong> Sus correos electr\u00f3nicos, documentos, calendario y contactos siguen estando totalmente protegidos. A continuaci\u00f3n, le explicamos qu\u00e9 ha ocurrido y por qu\u00e9 puede seguir usando Mailfence con normalidad.<\/p>\n\n\n\n<h2 id=\"h-que-es-la-vulnerabilidad-php2shell\" class=\"wp-block-heading\">\u00bfQu\u00e9 es la vulnerabilidad PHP2Shell?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PHP2Shell hace referencia a dos fallos de seguridad cr\u00edticos (CVE-2026-109618 y CVE-2026-109619) en PHP<\/strong>, el lenguaje de programaci\u00f3n que utiliza aproximadamente el 75 % de todos los sitios web.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El <a href=\"https:\/\/www.php.net\/\" target=\"_blank\" rel=\"noreferrer noopener\">proyecto PHP public\u00f3 unos parches<\/a> el 21 de octubre de 2026. Pero <a href=\"https:\/\/watchtowr.com\/intelligence\/php-remote-code-execution-php2shell\/\" target=\"_blank\" rel=\"noreferrer noopener\">watchTowr confirm\u00f3 que las vulnerabilidades estaban siendo explotadas activamente<\/a> ese mismo d\u00eda, con intentos de ataque registrados desde el 17 de octubre.<\/p>\n\n\n\n<h2 id=\"h-por-que-la-vulnerabilidad-php2shell-no-afecta-a-mailfence\" class=\"wp-block-heading\">\u00bfPor qu\u00e9 la vulnerabilidad PHP2Shell no afecta a Mailfence?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La buena noticia es que <strong>Mailfence no usa PHP para prestar su servicio.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dado que PHP2Shell afecta espec\u00edficamente a entornos de servidor que ejecutan PHP, esta v\u00eda de ataque simplemente no existe en nuestros sistemas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>El entorno de ejecuci\u00f3n principal de PHP no forma parte de nuestra infraestructura tecnol\u00f3gica, por lo que los datos de Mailfence nunca estuvieron expuestos a estas vulnerabilidades.<\/strong><\/p>\n\n\n\n<h2 id=\"h-como-hemos-reaccionado\" class=\"wp-block-heading\">C\u00f3mo hemos reaccionado<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aunque nuestros sistemas no son directamente vulnerables, nos tomamos muy en serio cualquier incidente de seguridad importante.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nuestro equipo de seguridad revis\u00f3 todos los sistemas en cuanto se hizo p\u00fablica la informaci\u00f3n de vulnerabilidad.<\/strong> La revisi\u00f3n incluy\u00f3 una auditor\u00eda completa de los servicios auxiliares y las dependencias de terceros.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En cuanto a las p\u00e1ginas de nuestro blog p\u00fablico y nuestra base de conocimientos, <strong>nuestro proveedor de alojamiento ya hab\u00eda instalado los parches de protecci\u00f3n antes incluso de que se publicaran las actualizaciones oficiales.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Las cuentas de Mailfence y los datos de los usuarios<strong> <strong><strong>en ning\u00fan momento <strong><strong>estuvieron<\/strong><\/strong> en riesgo<\/strong><\/strong><\/strong>.<\/strong> Seguimos supervisando de cerca la evoluci\u00f3n de la situaci\u00f3n.<\/p>\n\n\n\n<h2 id=\"h-que-debe-hacer\" class=\"wp-block-heading\">\u00bfQu\u00e9 debe hacer?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si usa Mailfence como servicio de correo electr\u00f3nico, no necesita realizar ninguna acci\u00f3n. Su cuenta est\u00e1 protegida.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sin embargo, <strong>la vulnerabilidad PHP2Shell podr\u00eda afectar a otros servicios que utilice.<\/strong> Las plataformas autohospedadas, los sitios de WordPress y las aplicaciones web que funcionan con PHP pueden ser vulnerables.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por ello, le recomendamos lo siguiente:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Actualice inmediatamente cualquier servicio basado en PHP.<\/strong> Si gestiona sus propios sitios web o aplicaciones, instale cuanto antes la \u00faltima versi\u00f3n de PHP que incluya las correcciones de seguridad correspondientes.<\/li>\n\n\n\n<li><strong>Tenga cuidado con los correos de phishing.<\/strong> Las vulnerabilidades importantes suelen dar lugar a campa\u00f1as de phishing que se hacen pasar por avisos de \u00abactualizaciones de seguridad urgentes\u00bb. No hagas clic en enlaces sospechosos.<\/li>\n\n\n\n<li><strong>Active la autenticaci\u00f3n de dos factores.<\/strong> Si a\u00fan no ha activado <a href=\"https:\/\/kb.mailfence.com\/es\/kb\/como-configurar-la-autenticacion-de-dos-factores-2fa\/\" target=\"_blank\" rel=\"noreferrer noopener\">la autenticaci\u00f3n de dos factores (2FA) en su cuenta de Mailfence<\/a>, este es un buen momento para hacerlo.<\/li>\n\n\n\n<li><strong>Use contrase\u00f1as seguras y diferentes para cada servicio.<\/strong> Un gestor de contrase\u00f1as le facilitar\u00e1 esta tarea. As\u00ed, si otra de sus cuentas se ve comprometida, su correo de Mailfence seguir\u00e1 protegido.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-por-que-importa-la-arquitectura-de-su-proveedor-de-correo-electronico\" class=\"wp-block-heading\">Por qu\u00e9 importa la arquitectura de su proveedor de correo electr\u00f3nico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La vulnerabilidad PHP2Shell nos recuerda que <strong>la tecnolog\u00eda que hay detr\u00e1s de un servicio de correo electr\u00f3nico es fundamental para su seguridad.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una sola vulnerabilidad en PHP puso en riesgo millones de sitios web y aplicaciones. De repente, las decisiones tecnol\u00f3gicas que su proveedor de correo electr\u00f3nico tom\u00f3 a\u00f1os atr\u00e1s pueden marcar la diferencia entre mantener sus datos protegidos y sufrir un incidente de seguridad.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mailfence se cre\u00f3 desde el principio con la seguridad como principio fundamental. Entre sus medidas de protecci\u00f3n se incluyen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cifrado de extremo a extremo con OpenPGP<\/strong>: solo usted y su destinatario pueden leer sus correos electr\u00f3nicos<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/blog.mailfence.com\/es\/cifrado-en-reposo\/\" target=\"_blank\" rel=\"noreferrer noopener\">Cifrado de datos en reposo<\/a><\/strong>: protege los datos almacenados en nuestros servidores<\/li>\n\n\n\n<li><strong>Legislaci\u00f3n belga en materia de privacidad y el cumplimiento del RGPD<\/strong>: sin publicidad, sin seguimiento y sin puertas traseras<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00bfTiene alguna duda? P\u00f3ngase en contacto con nosotros en <a href=\"mailto:support@mailfence.com\" target=\"_blank\" rel=\"noreferrer noopener\">support@mailfence.com<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La semana pasada, dos vulnerabilidades cr\u00edticas de PHP sacudieron Internet. Conocidas como \u00abPHP2Shell\u00bb, las vulnerabilidades \u00abCVE-2026-109618\u00bb y \u00abCVE-2026-109619\u00bb permiten a los atacantes ejecutar c\u00f3digo en servidores web sin necesidad de iniciar sesi\u00f3n. Si ha visto las noticias, probablemente se pregunte si su correo electr\u00f3nico est\u00e1 a salvo. Su cuenta de Mailfence no se ha visto [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":115166,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18607,18609],"tags":[],"class_list":["post-115179","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novedades-de-mailfence","category-privacidad"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Vulnerabilidad PHP2Shell: \u00bfest\u00e1 segura su cuenta de Mailfence? | Mailfence Blog<\/title>\n<meta name=\"description\" content=\"Descubra qu\u00e9 es la vulnerabilidad PHP2Shell, c\u00f3mo afecta a los servidores PHP y por qu\u00e9 su cuenta de Mailfence no est\u00e1 en riesgo.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mailfence.com\/es\/vulnerabilidad-php2shell\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vulnerabilidad PHP2Shell: su cuenta de Mailfence est\u00e1 protegida | Mailfence Blog\" \/>\n<meta property=\"og:description\" content=\"Vulnerabilidad PHP2Shell: su cuenta de Mailfence est\u00e1 protegida | Mailfence Blog\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.mailfence.com\/es\/vulnerabilidad-php2shell\/\" \/>\n<meta property=\"og:site_name\" content=\"Mailfence Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mailfence\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/mailfence\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-26T14:18:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-27T07:55:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.mailfence.com\/wp-content\/uploads\/2026\/10\/php2shell-mailfence-secure-featured-image.png\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"602\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Mailfence Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@mailfence\" \/>\n<meta name=\"twitter:site\" content=\"@mailfence\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mailfence Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/vulnerabilidad-php2shell\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/vulnerabilidad-php2shell\\\/\"},\"author\":{\"name\":\"Mailfence Team\",\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/#\\\/schema\\\/person\\\/6871a371651b37c95cd980c95165f74b\"},\"headline\":\"Vulnerabilidad PHP2Shell: su cuenta de Mailfence est\u00e1 protegida\",\"datePublished\":\"2026-10-26T14:18:26+00:00\",\"dateModified\":\"2026-10-27T07:55:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/vulnerabilidad-php2shell\\\/\"},\"wordCount\":731,\"publisher\":{\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/vulnerabilidad-php2shell\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blog.mailfence.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/php2shell-mailfence-secure-featured-image.png\",\"articleSection\":[\"Novedades de Mailfence\",\"Privacidad\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/vulnerabilidad-php2shell\\\/\",\"url\":\"https:\\\/\\\/blog.mailfence.com\\\/es\\\/vulnerabilidad-php2shell\\\/\",\"name\":\"Vulnerabilidad PHP2Shell: \u00bfest\u00e1 segura su cuenta de Mailfence? 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