{"id":"CVE-2023-29336","published":"2023-05-09T18:15:13Z","modified":"2026-06-17T05:49:49Z","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":"A privilege escalation flaw in Microsoft's Win32k component, the kernel-mode graphics subsystem of Windows, stems from a use-after-free condition. An attacker who already has local, low-privilege access to the system can exploit it without user interaction to gain elevated privileges with high impact to confidentiality, integrity and availability.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:10:52Z"},"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":0.41185,"percentile":0.98666,"date":"2026-10-31","provenance":"source"},"kev":{"dateAdded":"2023-05-09","dueDate":"2023-05-30","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-29336; https://nvd.nist.gov/vuln/detail/CVE-2023-29336","provenance":"source"},"vulncheckKev":{"dateAdded":"2023-05-09","exploitedFirstSeen":"2023-05-09","ransomware":false,"evidence":[{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2023-May","date":"2023-05-09"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2023-05-09"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2023-05-09"},{"url":"https://securelist.com/it-threat-evolution-q2-2023-non-mobile-statistics/110413/","date":"2023-08-30"},{"url":"https://ti.qianxin.com/uploads/2024/02/02/dcc93e586f9028c68e7ab34c3326ff31.pdf","date":"2024-02-02"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":null,"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29336","tags":["Patch","Vendor Advisory"]},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29336","tags":["Patch","Vendor Advisory"]},{"url":"https://www.exploit-db.com/exploits/52301","tags":["Exploit"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-29336","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 privilege escalation flaw in kernel driver","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-2023-32910","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-32910","exploited":true,"exploitedSince":"2023-05-09","provenance":"source"},"exploits":[{"id":52301,"url":"https://www.exploit-db.com/exploits/52301","title":"Microsoft Windows Server 2016 - Win32k Elevation of Privilege","type":"local","platform":"windows","date":"2025-05-25","verified":false,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":1,"earliest":"2025-05-25"},"pocGithub":{"count":1,"skipped":0,"earliest":"2023-06-09","earliestUrl":"https://github.com/m-cetin/CVE-2023-29336","repos":[{"name":"m-cetin/CVE-2023-29336","url":"https://github.com/m-cetin/CVE-2023-29336","stars":20,"created":"2023-06-09"}]},"first":{"date":"2023-06-09","source":"PoC-in-GitHub","url":"https://github.com/m-cetin/CVE-2023-29336"},"provenance":"source"},"exploitRefs":["https://www.exploit-db.com/exploits/52301"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2023-05-09","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29336","provenance":"source"},{"date":"2023-05-09","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2023-May","provenance":"source"},{"date":"2023-05-09","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2023-05-09","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-32910","provenance":"source"},{"date":"2023-06-09","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub; later: Exploit-DB 2025-05-25","url":"https://github.com/m-cetin/CVE-2023-29336","provenance":"source"}],"speed":{"daysToPublicExploit":31,"firstExploitFrom":"PoC-in-GitHub","daysToKev":0},"priority":{"score":65.2,"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 1272 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.73,"detail":"percentile 0.9867"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 Exploit-DB entry; 1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-416"}}