{"id":"CVE-2022-21882","published":"2022-01-11T21:15:11Z","modified":"2026-08-15T04:18:00Z","title":"Microsoft Win32k Privilege Escalation Vulnerability","vendor":"Microsoft","product":"Win32k","tier":"core","eol":null,"description":{"text":"Win32k Elevation of Privilege Vulnerability","provenance":"source","from":"NVD"},"summary":{"text":"The Win32k kernel-mode component in Microsoft Windows contains a flaw in which an out-of-bounds write can be triggered, enabling elevation of privilege. An attacker with local access and low-privileged credentials can exploit it without any user interaction to gain higher privileges on the affected system.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T06:59:01Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.59205,"percentile":0.99114,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2022-02-04","dueDate":"2022-02-18","ransomware":true,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2022-21882","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-01-11","exploitedFirstSeen":"2022-01-11","ransomware":true,"evidence":[{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2022-Jan","date":"2022-01-11"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2022-01-11"},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21882","date":"2022-01-13"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-02-04"},{"url":"https://asec.ahnlab.com/en/38156/","date":"2022-09-01"},{"url":"https://raw.githubusercontent.com/blackorbird/APT_REPORT/master/summary/2023/360_APT_Annual_Research_Report_2022.pdf","date":"2023-01-17"},{"url":"https://www.cisa.gov/sites/default/files/2024-07/aa24-207a-dprk-cyber-group-conducts-global-espionage-campaign.pdf","date":"2024-07-25"},{"url":"https://bi.zone/upload/for_download/Threat_Zone_2025_BI.ZONE_Research_rus.pdf","date":"2025-04-08"}],"evidenceTotal":8,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21882","tags":["Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/166169/Win32k-ConsoleControl-Offset-Confusion-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21882","tags":["Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-21882","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Local kernel vuln exploited for privilege escalation","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Win32k Elevation of Privilege Vulnerability","start":0,"end":43}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-27038","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-27038","exploited":true,"exploitedSince":"2022-02-04","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":5,"skipped":0,"earliest":"2022-01-27","earliestUrl":"https://github.com/KaLendsi/CVE-2022-21882","repos":[{"name":"KaLendsi/CVE-2022-21882","url":"https://github.com/KaLendsi/CVE-2022-21882","stars":461,"created":"2022-01-27"},{"name":"L4ys/CVE-2022-21882","url":"https://github.com/L4ys/CVE-2022-21882","stars":196,"created":"2022-02-03"},{"name":"sailay1996/cve-2022-21882-poc","url":"https://github.com/sailay1996/cve-2022-21882-poc","stars":49,"created":"2022-02-07"},{"name":"David-Honisch/CVE-2022-21882","url":"https://github.com/David-Honisch/CVE-2022-21882","stars":8,"created":"2022-02-01"},{"name":"r1l4-i3pur1l4/CVE-2022-21882","url":"https://github.com/r1l4-i3pur1l4/CVE-2022-21882","stars":6,"created":"2022-02-14"}]},"metasploit":[{"name":"Win32k ConsoleControl Offset Confusion","module":"exploit/windows/local/cve_2022_21882_win32k","type":"exploit","disclosureDate":"2021-02-09","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/cve_2022_21882_win32k.rb"}],"first":{"date":"2021-02-09","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/cve_2022_21882_win32k.rb"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/166169/Win32k-ConsoleControl-Offset-Confusion-Privilege-Escalation.html"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2021-02-09","kind":"exploit-public","label":"First public exploit: Metasploit; later: PoC-in-GitHub 2022-01-27","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/cve_2022_21882_win32k.rb","provenance":"source"},{"date":"2022-01-11","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21882","provenance":"source"},{"date":"2022-01-11","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2022-Jan","provenance":"source"},{"date":"2022-02-04","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-02-04","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-27038","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":24},"priority":{"score":78.3,"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 1752 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: 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