{"id":"CVE-2022-21919","kind":"vulnerability","aliases":["CVE-2022-21919"],"related":[],"title":"Microsoft Windows: Microsoft Windows User Profile Service Privilege Escalation Vulnerability","description":"Microsoft Windows User Profile Service contains an unspecified vulnerability that allows for privilege escalation.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Windows User Profile Service has an unspecified flaw that lets a local user escalate privileges. An attacker who already has a foothold on the machine can gain higher-level rights, such as SYSTEM or administrator.","severity":"high","cvss":7.0,"epss":0.02434,"exploited":true,"exploited_at":"2022-04-25T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","windows"],"not_affected_if":["unpatched-build-already-updated"],"how_to_check":null,"fix":"Apply the Microsoft Windows security update for CVE-2022-21919 per vendor instructions (CISA KEV required action).","status":"open","published_at":"2022-01-11T21:15:13+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:42+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:17:42Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows security update for CVE-2022-21919 per vendor instructions (CISA KEV required action).\nunknown","reach":"local","impact":"high","summary":"Microsoft Windows User Profile Service has an unspecified flaw that lets a local user escalate privileges. An attacker who already has a foothold on the machine can gain higher-level rights, such as SYSTEM or administrator.","category":"infrastructure","who_cares":["windows","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"local attacker gains elevated privileges on the Windows machine","analyst_note":"Find the affected Windows builds and the patch KB list in the Microsoft Security Update Guide entry for CVE-2022-21919; sources gave no version range.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unpatched-build-already-updated"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000459,"input_tokens":2821,"output_tokens":353,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':12A,15A '-21919':13A,16A 'action':78C 'administr':61B 'allow':72C 'alreadi':44B 'appli':79C 'attack':42B 'cisa':76C 'contain':67C 'cve':11A,14A 'escal':9A,39B,75C 'exploit':19B 'flaw':33B 'foothold':47B 'gain':52B 'higher':54B 'higher-level':53B 'host':23B 'infrastructur':20B 'instruct':83C 'let':35B 'level':55B 'local':37B 'machin':50B 'microsoft':1A,3A,17A,25B,62C 'per':81C 'privileg':8A,40B,74C 'profil':6A,28B,65C 'requir':77C 'right':56B 'self':22B 'self-host':21B 'servic':7A,29B,66C 'system':59B 'unspecifi':32B,69C 'updat':80C 'user':5A,27B,38B,64C 'vendor':82C 'vulner':10A,70C 'window':2A,4A,24B,26B,63C 'windows':18A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-01-11T21:15:13+00:00","kev":{"dateAdded":"2022-04-25","dueDate":"2022-05-16","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:H/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-2022-21919","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-21919","severity":null,"published_at":"2022-04-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T16:39:48+00:00","note":null},{"source":"epss","external_id":"CVE-2022-21919","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-21919","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-21919","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21919","severity":null,"published_at":"2022-01-11T21:15:13+00:00","modified_at":"2026-06-17T04:27:16+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}