{"id":"CVE-2022-26904","kind":"vulnerability","aliases":["CVE-2022-26904"],"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":"A flaw in the Windows User Profile Service lets a local user raise their privileges on the machine. An attacker who already has a low-privilege account can gain higher rights, such as SYSTEM or Administrator.","severity":"high","cvss":7.0,"epss":0.16948,"exploited":true,"exploited_at":"2022-04-25T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":"Apply the Microsoft Windows security update for CVE-2022-26904 per vendor instructions, as CISA requires.","status":"open","published_at":"2022-04-15T19:15:15+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:41+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:17:41Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows security update for CVE-2022-26904 per vendor instructions, as CISA requires.\nunknown","reach":"local","impact":"high","summary":"A flaw in the Windows User Profile Service lets a local user raise their privileges on the machine. An attacker who already has a low-privilege account can gain higher rights, such as SYSTEM or Administrator.","category":"infrastructure","who_cares":["windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"Local user gains administrator or SYSTEM rights on the Windows machine","analyst_note":"Sources do not list affected or fixed Windows builds; check Microsoft's advisory for CVE-2022-26904 and the KEV entry for the required update.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000448,"input_tokens":2821,"output_tokens":332,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':12A,15A '-26904':13A,16A 'account':49B 'action':75C 'administr':58B 'allow':69C 'alreadi':43B 'appli':76C 'attack':41B 'cisa':73C 'contain':64C 'cve':11A,14A 'escal':9A,72C 'exploit':19B 'flaw':23B 'gain':51B 'higher':52B 'infrastructur':20B 'instruct':80C 'let':30B 'local':32B 'low':47B 'low-privileg':46B 'machin':39B 'microsoft':1A,3A,17A,59C 'per':78C 'privileg':8A,36B,48B,71C 'profil':6A,28B,62C 'rais':34B 'requir':74C 'right':53B 'servic':7A,29B,63C 'system':56B 'unspecifi':66C 'updat':77C 'user':5A,27B,33B,61C 'vendor':79C 'vulner':10A,67C 'window':2A,4A,21B,26B,60C 'windows':18A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-04-15T19:15:15+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-2022-26904","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-26904","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":"2026-10-25T15:39:42+00:00","note":null},{"source":"epss","external_id":"CVE-2022-26904","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-26904","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-2022-26904","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26904","severity":null,"published_at":"2022-04-15T19:15:15+00:00","modified_at":"2026-06-17T04:36:05+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"}