{"id":245412,"date":"2026-10-15T01:41:42","date_gmt":"2026-10-15T06:41:42","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/10\/cisco-warns-of-active-attacks-exploiting-new-critical-secure-email-gateway-vulnerability"},"modified":"2026-10-15T01:41:42","modified_gmt":"2026-10-15T06:41:42","slug":"cisco-warns-of-active-attacks-exploiting-new-critical-secure-email-gateway-vulnerability","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/10\/cisco-warns-of-active-attacks-exploiting-new-critical-secure-email-gateway-vulnerability","title":{"rendered":"Cisco Warns of Active Attacks Exploiting New Critical Secure Email Gateway Vulnerability"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/cisco-warns-of-active-attacks-exploiting-new-critical-secure-email-gateway-vulnerability.webp\"><\/a><\/p>\n<p>Attackers are exploiting a critical flaw in Cisco Secure Email Gateway that lets a sender with no login write files to the appliance\u2019s operating system, Cisco <a href=\"https:\/\/sec.cloudapps.cisco.com\/security\/center\/content\/CiscoSecurityAdvisory\/cisco-sa-esa-afw-zqYJkjxp\" target=\"_blank\">said in an advisory<\/a> on Wednesday.<\/p>\n<p>The attacker sends an email with a crafted attachment through the gateway and, if it succeeds, could then run commands as root. The appliance filters an organization\u2019s email for spam, malware, and other threats, and only a gateway with the File Reputation service enabled and a Content Scanner Tools package older than version 25.3.0.5525 is vulnerable.<\/p>\n<p>The fix has been shipping since September 14 in AsyncOS 15.5.5\u2013014 and 16.5.0\u2013780, the builds Cisco listed as fixed in a hardening release that day, which the company now says covered this flaw. It also arrives as a Content Scanner Tools update, version 25.3.0.5525 or later, which installs without a software upgrade or a restart.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Attackers are exploiting a critical flaw in Cisco Secure Email Gateway that lets a sender with no login write files to the appliance\u2019s operating system, Cisco said in an advisory on Wednesday. The attacker sends an email with a crafted attachment through the gateway and, if it succeeds, could then run commands as root. The [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34,1694],"tags":[],"class_list":["post-245412","post","type-post","status-publish","format-standard","hentry","category-cybercrime-malcode","category-electronics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/245412","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=245412"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/245412\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=245412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=245412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=245412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}