{"id":"CVE-2021-36942","aliases":["EUVD-2021-23518","GHSA-p8qf-gcxq-47xm"],"status":"published","title":"Windows LSA Spoofing Vulnerability","description":"Windows LSA Spoofing Vulnerability","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.66023,"percentile":0.99284,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-290","CWE-749"],"published":"2021-08-12T18:12:29Z","modified":"2026-08-10T20:19:03Z","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2021-11-03"},{"source":"kev","since":"2021-11-03"}],"exploits":[{"source":"metasploit","id":"auxiliary/scanner/dcerpc/petitpotam","title":"PetitPotam","type":"auxiliary","verified":true,"url":"https://www.rapid7.com/db/modules/auxiliary/scanner/dcerpc/petitpotam"}],"products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows server 2008 r2 service pack 1"},{"vendor":"microsoft","product":"windows server 2008 r2 service pack 1 (server core installation)"},{"vendor":"microsoft","product":"windows server 2008 service pack 2"},{"vendor":"microsoft","product":"windows server 2008 service pack 2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows_server_2004"},{"vendor":"microsoft","product":"windows_server_2008"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_20h2"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/405600","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","Exploit","Third Party Advisory","US Government Resource"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36942","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36942"},{"url":"https://github.com/advisories/GHSA-p8qf-gcxq-47xm"}],"sources":{"cve":[{"id":"CVE-2021-36942","title":"Windows LSA Spoofing Vulnerability","description":"Windows LSA Spoofing 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