{"id":"CVE-2025-26633","published":"2025-03-11T17:16:43Z","modified":"2026-09-24T13:10:00Z","title":"Microsoft Windows Management Console (MMC) Improper Neutralization Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally.","provenance":"source","from":"NVD"},"summary":{"text":"The vulnerability is an improper neutralization flaw in the Microsoft Management Console (MMC) component of Microsoft Windows. An attacker with local access can bypass a security feature, provided they can get a user to interact with the crafted input or content and the attack conditions are met.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:00:11Z"},"cvss":{"score":7.0,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.30391,"percentile":0.98232,"date":"2026-10-31","provenance":"source"},"kev":{"dateAdded":"2025-03-11","dueDate":"2025-04-01","ransomware":true,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-26633 ; https://nvd.nist.gov/vuln/detail/CVE-2025-26633","provenance":"source"},"vulncheckKev":{"dateAdded":"2025-03-11","exploitedFirstSeen":"2025-03-11","ransomware":true,"evidence":[{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2025-Mar","date":"2025-03-11"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2025-03-11"},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26633","date":"2025-03-11"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2025-03-11"},{"url":"https://www.trendmicro.com/en_us/research/25/c/cve-2025-26633-water-gamayun.html","date":"2025-03-25"},{"url":"https://attackerkb.com/topics/zwqoJYnfsd/cve-2025-26633","date":"2025-03-26"},{"url":"https://www.trendmicro.com/en_us/research/25/c/deep-dive-into-water-gamayun.html","date":"2025-03-28"},{"url":"https://www.kelacyber.com/resources/research/2025_midyear_threat_report/","date":"2025-08-08"},{"url":"https://medium.com/s2wblog/ransomware-landscape-in-h1-2025-statistics-and-key-issues-9e8c1a6b4e2c","date":"2025-08-12"},{"url":"https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/when-hackers-call-social-engineering-abusing-brave-support-and-encrypthubs-expanding-arsenal/","date":"2025-08-13"}],"evidenceTotal":17,"provenance":"source"},"exploited":true,"otx":null,"cwes":[{"id":"CWE-707","name":"Improper Neutralization"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26633","tags":["Vendor Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-detection-script","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-mitigation-script","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26633","tags":["US Government Resource"]}],"techniques":[{"id":"T1211","name":"Exploitation for Stealth","tactics":["stealth"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local bypass of security feature","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an unauthorized attacker to bypass a security feature locally","start":56,"end":124}],"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: injection enables command or script execution","mappingType":"primary_impact","evidence":[{"from":"description","quote":"Improper neutralization in Microsoft Management Console","start":0,"end":55}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2025-6311","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-6311","exploited":true,"exploitedSince":"2025-03-11","provenance":"source"},"exploits":[{"id":52498,"url":"https://www.exploit-db.com/exploits/52498","title":"Microsoft MMC MSC EvilTwin - Local Admin Creation","type":"local","platform":"windows","date":"2026-04-08","verified":false,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":1,"earliest":"2026-04-08"},"pocGithub":{"count":2,"skipped":0,"earliest":"2025-04-08","earliestUrl":"https://github.com/sandsoncosta/CVE-2025-26633","repos":[{"name":"mbanyamer/MSC-EvilTwin-Local-Privilege-Escalation","url":"https://github.com/mbanyamer/MSC-EvilTwin-Local-Privilege-Escalation","stars":4,"created":"2025-11-22"},{"name":"sandsoncosta/CVE-2025-26633","url":"https://github.com/sandsoncosta/CVE-2025-26633","stars":2,"created":"2025-04-08"}]},"first":{"date":"2025-04-08","source":"PoC-in-GitHub","url":"https://github.com/sandsoncosta/CVE-2025-26633"},"provenance":"source"},"exploitRefs":["https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-detection-script","https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-mitigation-script"],"flow":[{"stage":"exploitation","techniques":["T1211"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2025-03-11","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-26633","provenance":"source"},{"date":"2025-03-11","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2025-Mar","provenance":"source"},{"date":"2025-03-11","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2025-03-11","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-6311","provenance":"source"},{"date":"2025-04-08","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub; later: Exploit-DB 2026-04-08","url":"https://github.com/sandsoncosta/CVE-2025-26633","provenance":"source"}],"speed":{"daysToPublicExploit":28,"firstExploitFrom":"PoC-in-GitHub","daysToKev":0},"priority":{"score":74.5,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 600 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":19.65,"detail":"percentile 0.9823"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"2 NVD references tagged Exploit; 1 Exploit-DB entry; 2 PoC-in-GitHub repos"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":4.9,"detail":"base score 7.0"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}