{"id":235905,"date":"2026-04-25T06:09:33","date_gmt":"2026-04-25T11:09:33","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/04\/firestarter-malware-survives-cisco-firewall-updates-security-patches"},"modified":"2026-04-25T06:09:33","modified_gmt":"2026-04-25T11:09:33","slug":"firestarter-malware-survives-cisco-firewall-updates-security-patches","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/04\/firestarter-malware-survives-cisco-firewall-updates-security-patches","title":{"rendered":"Firestarter malware survives Cisco firewall updates, security patches"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/firestarter-malware-survives-cisco-firewall-updates-security-patches2.jpg\"><\/a><\/p>\n<p>Cybersecurity agencies in the U.S. and U.K. are warning about a custom malware called Firestarter persisting on Cisco Firepower and Secure Firewall devices running Adaptive Security Appliance (ASA) or Firepower Threat Defense (FTD) software.<\/p>\n<p>The backdoor has been attributed to a threat actor that Cisco Talos tracks internally as UAT-4356, known for cyberespionage campaigns, including <a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/arcanedoor-hackers-exploit-cisco-zero-days-to-breach-govt-networks\/\" rel=\"nofollow noopener\">ArcaneDoor<\/a>.<\/p>\n<p>The U.S. Cybersecurity and Infrastructure Security Agency (CISA) and the U.K. National Cyber Security Center (NCSC) believe that the adversary obtained initial access by exploiting a missing authorization issue (CVE-2025\u201320333) and\/or a buffer overflow bug (CVE-2025\u201320362).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cybersecurity agencies in the U.S. and U.K. are warning about a custom malware called Firestarter persisting on Cisco Firepower and Secure Firewall devices running Adaptive Security Appliance (ASA) or Firepower Threat Defense (FTD) software. The backdoor has been attributed to a threat actor that Cisco Talos tracks internally as UAT-4356, known for cyberespionage campaigns, including [\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],"tags":[],"class_list":["post-235905","post","type-post","status-publish","format-standard","hentry","category-cybercrime-malcode"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/235905","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=235905"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/235905\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=235905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=235905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=235905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}