{"id":"CVE-2023-29336","kind":"vulnerability","aliases":["CVE-2023-29336"],"related":[],"title":"Win32k Elevation of Privilege Vulnerability","description":"Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Win32k contains a flaw that lets a local user escalate privileges to SYSTEM. Exploitation in the wild is confirmed by CISA's Known Exploited Vulnerabilities catalog.","severity":"high","cvss":7.8,"epss":null,"exploited":true,"exploited_at":"2023-05-09T00:00:00+00:00","products":[{"name":"Microsoft Win32k","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.19926"],"affected":"< 10.0.10240.19926","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.5921"],"affected":"< 10.0.14393.5921","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","microsoft-windows","windows"],"not_affected_if":["unpatched-only-if-updated"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2023-29336 per vendor instructions (CISA required action); the specific patched build is unknown from the sources.","status":"open","published_at":"2023-05-09T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:06:49+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:06:49Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2023-29336 per vendor instructions (CISA required action); the specific patched build is unknown from the sources.","reach":"local","impact":"high","summary":"Microsoft Win32k contains a flaw that lets a local user escalate privileges to SYSTEM. Exploitation in the wild is confirmed by CISA's Known Exploited Vulnerabilities catalog.","category":"infrastructure","who_cares":["windows","microsoft-windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"Local attacker gains SYSTEM privileges on the Windows machine.","analyst_note":"Find the affected Windows builds and the patch KB from the Microsoft Security Response Center advisory for CVE-2023-29336.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unpatched-only-if-updated"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000455,"input_tokens":2784,"output_tokens":353,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':7A,10A '-29336':8A,11A '10':16A,20A '1507':17A '1607':21A '2008':25A,29A '2012':33A,37A '2016':41A 'action':92C 'allow':82C 'appli':93C 'catalog':74B 'cisa':69B,90C 'confirm':67B 'contain':50B,77C 'cve':6A,9A 'elev':2A 'escal':58B,85C 'exploit':42B,62B,72B 'flaw':52B 'infrastructur':43B 'instruct':97C 'known':71B 'let':54B 'local':56B 'microsoft':12A,14A,18A,22A,26A,30A,34A,38A,45B,48B,75C 'microsoft-window':44B 'per':95C 'privileg':4A,59B,84C,89C 'requir':91C 'server':24A,28A,32A,36A,40A 'system':61B,88C 'unspecifi':79C 'updat':94C 'user':57B 'vendor':96C 'vulner':5A,73B,80C 'wild':65B 'win32k':1A,13A,49B,76C 'window':46B,47B 'windows':15A,19A,23A,27A,31A,35A,39A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-05-09T00:00:00+00:00","kev":{"dateAdded":"2023-05-09","dueDate":"2023-05-30","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-29336","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-29336","severity":null,"published_at":"2023-05-09T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-29336","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29336","severity":null,"published_at":"2023-05-09T18:15:13+00:00","modified_at":"2026-06-17T05:49:49+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}