[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fg3LXoJY69tTozEKotZ5S_rJlUcMSqnfT5CSFcaESbS0":3},{"article":4,"iocs":46,"watch_terms":55,"solutions":56,"lesson":150},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":23,"category":24,"article_tags":28},"4c4ae87c-5494-409d-a974-be120238a405","2026-013: Critical Vulnerability in F5 BIG-IP APM","2026-013-critical-vulnerability-in-f5-big-ip-apm-499e74","On 22 September 2026, F5 published an advisory addressing a critical vulnerability affecting its BIG-IP APM product. The vendor confirmed active exploitation in the wild. CERT-EU recommends taking appropriate actions as soon as possible.","F5 has released an advisory for a critical heap-based buffer overflow vulnerability (CVE-2026-94127) in its BIG-IP APM product, with a CVSS score of 9.8. The vendor has confirmed that this vulnerability is being actively exploited in the wild, allowing unauthenticated attackers to achieve remote code execution. CERT-EU urges immediate action, including applying hotfixes and checking for signs of compromise.","F5 BIG-IP APM product has a critical vulnerability with active exploitation in the wild.","https:\u002F\u002Fcert.europa.eu\u002Fpublications\u002Fsecurity-advisories\u002F2026-013\u002F","https:\u002F\u002Fcert.europa.eu\u002Ffiles\u002Fimages\u002Fcerteu_home_share-v2.png","2026-09-22T16:52:36+00:00","2026-10-31T10:00:29.349452+00:00",9,[17,20],{"name":18,"type":19},"BIG-IP APM","product",{"name":21,"type":22},"F5","vendor","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":23,"icon":25,"name":26,"slug":27},null,"Vulnerabilities","vulnerabilities",[29,34,39,41],{"category":30},{"id":31,"icon":25,"name":32,"slug":33},"26b0b636-0e31-4db1-bffb-61bdf9f20a58","Supply Chain","supply-chain",{"category":35},{"id":36,"icon":25,"name":37,"slug":38},"6cbdd207-aaa1-4176-9534-e156b125e917","Nation-state","nation-state",{"category":40},{"id":23,"icon":25,"name":26,"slug":27},{"category":42},{"id":43,"icon":25,"name":44,"slug":45},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[47,51],{"type":48,"value":49,"context":50},"cve","CVE-2026-94127","Critical heap-based buffer overflow vulnerability in F5 BIG-IP APM.",{"type":52,"value":53,"context":54},"malware","TMM SIGABRT","Indicator of compromise related to TMM entering a loop causing SOD daemon to send a SIGABRT.",[21,18],{"controls":57,"vendors":144},[58,87,115],{"slug":59,"name":60,"problem":61,"products":62},"vulnerability-management","Vulnerability scanning and prioritisation","You know which systems are vulnerable, and which ones to fix first.",[63,71,79],{"vendor_slug":64,"vendor_name":65,"vendor_logo":66,"product_slug":67,"product_name":68,"url":69,"description":70},"holm-security","Holm Security","\u002Fvendor-logos\u002Fholm-security.png","holm-security-platform","Holm Security Platform","https:\u002F\u002Fwww.holmsecurity.com\u002F","Vulnerability scanning of systems, web applications, cloud and the external attack surface, plus phishing simulation.",{"vendor_slug":72,"vendor_name":73,"vendor_logo":74,"product_slug":75,"product_name":76,"url":77,"description":78},"tenable","Tenable","\u002Fvendor-logos\u002Ftenable.png","tenable-vulnerability-management","Tenable Vulnerability Management","https:\u002F\u002Fwww.tenable.com\u002Fproducts\u002Fvulnerability-management","Cloud-based vulnerability scanning and prioritisation, built on Nessus.",{"vendor_slug":80,"vendor_name":81,"vendor_logo":82,"product_slug":83,"product_name":84,"url":85,"description":86},"rapid7","Rapid7","\u002Fvendor-logos\u002Frapid7.png","insightvm","Rapid7 Exposure Command (InsightVM)","https:\u002F\u002Fwww.rapid7.com\u002Fproducts\u002Finsightvm\u002F","Vulnerability scanning and risk-based prioritisation; InsightVM is now part of Exposure Command, alongside attack surface and cloud risk.",{"slug":88,"name":89,"problem":90,"products":91},"patch-management","Automated patch management","Known holes get closed in days, not months.",[92,100,107],{"vendor_slug":93,"vendor_name":94,"vendor_logo":95,"product_slug":96,"product_name":97,"url":98,"description":99},"ninjaone","NinjaOne","\u002Fvendor-logos\u002Fninjaone.png","ninjaone-patch-management","NinjaOne Patch Management","https:\u002F\u002Fwww.ninjaone.com\u002Fpatch-management\u002F","Automated patching of operating systems and third-party applications from the cloud.",{"vendor_slug":101,"vendor_name":102,"vendor_logo":103,"product_slug":88,"product_name":104,"url":105,"description":106},"qualys","Qualys","\u002Fvendor-logos\u002Fqualys.png","Qualys Patch Management","https:\u002F\u002Fwww.qualys.com\u002Fapps\u002Fpatch-management\u002F","Patch deployment for operating systems and third-party applications, linked to vulnerability findings.",{"vendor_slug":108,"vendor_name":109,"vendor_logo":110,"product_slug":111,"product_name":112,"url":113,"description":114},"microsoft","Microsoft","\u002Fvendor-logos\u002Fmicrosoft.png","intune","Microsoft Intune","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fmicrosoft-intune","Device management for Windows, macOS, iOS and Android, including update rings and compliance policies.",{"slug":116,"name":117,"problem":118,"products":119},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",[120,128,136],{"vendor_slug":121,"vendor_name":122,"vendor_logo":123,"product_slug":124,"product_name":125,"url":126,"description":127},"withsecure","WithSecure","\u002Fvendor-logos\u002Fwithsecure.png","elements-xdr","WithSecure Elements XDR","https:\u002F\u002Fwww.withsecure.com\u002Fen\u002Ffor-business\u002Fplatform\u002Fxdr\u002F","Endpoint detection and response with extended detection, on the Elements cloud platform.",{"vendor_slug":129,"vendor_name":130,"vendor_logo":131,"product_slug":132,"product_name":133,"url":134,"description":135},"huntress","Huntress","\u002Fvendor-logos\u002Fhuntress.png","managed-edr","Huntress Managed EDR","https:\u002F\u002Fwww.huntress.com\u002Fplatform\u002Fmanaged-edr","Endpoint detection and response monitored around the clock by Huntress analysts.",{"vendor_slug":137,"vendor_name":138,"vendor_logo":139,"product_slug":140,"product_name":141,"url":142,"description":143},"eset","ESET","\u002Fvendor-logos\u002Feset.png","eset-protect","ESET PROTECT","https:\u002F\u002Fwww.eset.com\u002Fint\u002Fbusiness\u002Fsolutions\u002Fendpoint-protection\u002F","Endpoint protection platform with detection and response add-ons.",[145],{"slug":146,"name":21,"logo_path":147,"roles":148},"f5","\u002Fvendor-logos\u002Ff5.png",[149],"affected",{"slug":151,"title":152,"body":153,"framework_refs":154,"framework_notes":162},"critical-f5-big-ip-apm-buffer-overflow-exploited-in-the-wild","Critical F5 BIG-IP APM Buffer Overflow Exploited in the Wild","A critical heap-based buffer overflow vulnerability (CVE-2026-94127) in F5 BIG-IP APM, scoring 9.8 on the CVSS scale, is being actively exploited by unauthenticated attackers to achieve remote code execution. BIG-IP APM is a widely deployed network access and authentication gateway, making it a high-value target that sits at the perimeter of many enterprise environments. The fact that exploitation is already occurring in the wild means organizations without a rapid patching process face immediate, material risk of full system compromise. This incident underscores that critical vulnerabilities in internet-facing appliances must be treated as emergencies requiring same-day response, not routine patch cycles.",[155,156,157,158,159,160,161],"CIS Control 7: Continuous Vulnerability Management","NIST SP 800-53 SI-2: Flaw Remediation","ISO\u002FIEC 27001:2022 A.8.8: Management of technical vulnerabilities","OWASP A06:2021 Vulnerable and Outdated Components","NIS2 Article 21(2)(b)","CIS Control 17: Incident Response Management","NIST CSF 2.0 PR.AA: Identity Management, Authentication, and Access Control",{"NIS2 Article 21(2)(b)":163,"NIST SP 800-53 SI-2: Flaw Remediation":164,"CIS Control 17: Incident Response Management":165,"OWASP A06:2021 Vulnerable and Outdated Components":166,"CIS Control 7: Continuous Vulnerability Management":167,"ISO\u002FIEC 27001:2022 A.8.8: Management of technical vulnerabilities":168,"NIST CSF 2.0 PR.AA: Identity Management, Authentication, and Access Control":169},"NIS2 mandates that operators of essential services implement incident handling and vulnerability management measures, including rapid response to actively exploited vulnerabilities in critical network infrastructure like BIG-IP APM.","SI-2 requires organizations to identify, report, and correct information system flaws on an established schedule — mandating an emergency patch process that would address actively exploited remote code execution vulnerabilities with urgency.","With active exploitation confirmed, a tested incident response plan is essential to quickly detect compromise, contain affected systems, and recover — capabilities that must be in place before an attack occurs, not after.","The vulnerability exists in an unpatched version of a widely deployed component (BIG-IP APM), which is precisely the risk OWASP A06 highlights — organizations must track and promptly update all software components, including network appliances.","A formal vulnerability management process with defined remediation timelines for critical findings would have driven immediate patching of this CVSS 9.8 flaw before active exploitation reached the organization.","This control requires timely identification and remediation of technical vulnerabilities, directly addressing the need to apply F5's hotfix immediately upon disclosure of an actively exploited flaw.","Since BIG-IP APM is an access and authentication gateway, restricting management interface exposure and enforcing strict access controls would reduce the attack surface available to unauthenticated remote attackers exploiting this flaw."]