{"id":"CVE-2026-33824","published":"2026-04-14T18:17:34Z","modified":"2026-09-25T18:17:25Z","title":"Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability","vendor":"Microsoft","product":"Internet Key Exchange (IKE) Service Extensions","tier":"core","eol":null,"description":{"text":"Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is a double free vulnerability in the Windows IKE Extension, part of Microsoft's Internet Key Exchange (IKE) Service Extensions. An unauthorized attacker with network access can exploit it without authentication or user interaction, which allows arbitrary code execution.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:22Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.77054,"percentile":0.99551,"date":"2026-10-31","provenance":"source"},"kev":{"dateAdded":"2026-08-18","dueDate":"2026-08-21","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-33824 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-33824","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-07-30","exploitedFirstSeen":"2026-07-30","ransomware":false,"evidence":[{"url":"https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/","date":"2026-07-30"},{"url":"https://www.recordedfuture.com/blog/july-2026-cve-landscape","date":"2026-08-07"},{"url":"https://www.tenable.com/blog/the-agentic-ai-threat-cluster-seven-incidents-three-actors-and-what-they-mean","date":"2026-08-14"},{"url":"https://previdian.com/CVE-2026-33824","date":"2026-08-18"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-08-18"},{"url":"https://x.com/mkolsek/status/2090457604786933930","date":"2026-08-20"},{"url":"https://cert.europa.eu/publications/threat-intelligence/cb26-09/","date":"2026-09-03"},{"url":"https://www.recordedfuture.com/blog/august-2026-cve-landscape","date":"2026-09-08"}],"evidenceTotal":8,"provenance":"source"},"exploited":true,"otx":null,"cwes":[{"id":"CWE-415","name":"Double Free"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33824","tags":["Vendor Advisory"]},{"url":"https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33824","tags":["US Government Resource"]}],"techniques":[{"id":"T1210","name":"Exploitation of Remote Services","tactics":["lateral-movement"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Network remote exploitation of IKE service","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an unauthorized attacker to execute code over a network","start":37,"end":99}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Successful exploit yields arbitrary code execution","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows an unauthorized attacker to execute code over a network","start":37,"end":99}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-22641","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-22641","exploited":true,"exploitedSince":"2026-08-18","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":2,"skipped":0,"earliest":"2026-04-21","earliestUrl":"https://github.com/kaleth4/CVE-2026-33824","repos":[{"name":"EpSiLoNPoInTOrI/IKEV2-POC","url":"https://github.com/EpSiLoNPoInTOrI/IKEV2-POC","stars":7,"created":"2026-05-18"},{"name":"kaleth4/CVE-2026-33824","url":"https://github.com/kaleth4/CVE-2026-33824","stars":2,"created":"2026-04-21"}]},"first":{"date":"2026-04-21","source":"PoC-in-GitHub","url":"https://github.com/kaleth4/CVE-2026-33824"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1210"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2026-04-14","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33824","provenance":"source"},{"date":"2026-04-21","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/kaleth4/CVE-2026-33824","provenance":"source"},{"date":"2026-07-30","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/","provenance":"source"},{"date":"2026-08-18","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-08-18","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-22641","provenance":"source"}],"speed":{"daysToPublicExploit":7,"firstExploitFrom":"PoC-in-GitHub","daysToKev":126},"priority":{"score":71.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":5.0,"detail":"added 94 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.91,"detail":"percentile 0.9955"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"2 PoC-in-GitHub repos"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}