{"id":"CVE-2019-0543","kind":"vulnerability","aliases":["CVE-2019-0543"],"related":[],"title":"Microsoft Windows: Microsoft Windows Privilege Escalation Vulnerability","description":"An elevation of privilege vulnerability exists when Windows improperly handles authentication requests, aka \"Microsoft Windows Elevation of Privilege Vulnerability.\" This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.","summary":"Microsoft Windows has a privilege escalation flaw in how it handles authentication requests. An attacker with a local foothold can run processes with elevated rights.","severity":"high","cvss":7.8,"epss":0.04718,"exploited":true,"exploited_at":"2022-03-15T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","ransomware","windows"],"not_affected_if":[],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2019-0543 per vendor instructions, as CISA requires.","status":"open","published_at":"2019-01-08T21:29:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:22:13+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:22:13Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2019-0543 per vendor instructions, as CISA requires.","reach":"local","impact":"high","summary":"Microsoft Windows has a privilege escalation flaw in how it handles authentication requests. An attacker with a local foothold can run processes with elevated rights.","category":"infrastructure","who_cares":["windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker with local access gains elevated process context on Windows.","analyst_note":"Confirm affected Windows builds and patch KB numbers from the Microsoft advisory for CVE-2019-0543; sources list affected and fixed versions as unknown. Ransomware use is tagged but unconfirmed in the sources.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00045,"input_tokens":2840,"output_tokens":332,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0543':10A,13A '-2019':9A,12A '10':94C,96C '2008':77C,91C '2012':70C,83C '2016':88C '2019':80C '7':67C '8.1':74C,85C 'affect':65C 'aka':57C 'attack':34B 'authent':31B,55C 'cve':8A,11A 'elev':43B,46C,60C 'escal':6A,25B 'exist':50C 'exploit':16B 'flaw':26B 'foothold':38B 'handl':30B,54C 'improp':53C 'infrastructur':17B 'local':37B 'microsoft':1A,3A,14A,20B,58C 'privileg':5A,24B,48C,62C 'process':41B 'r2':71C,92C 'ransomwar':18B 'request':32B,56C 'right':44B 'rt':73C 'run':40B 'server':69C,76C,79C,82C,87C,90C,97C 'vulner':7A,49C,63C 'window':2A,4A,19B,21B,52C,59C,66C,68C,72C,75C,78C,81C,84C,86C,89C,93C,95C 'windows':15A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-01-08T21:29:00+00:00","kev":{"dateAdded":"2022-03-15","dueDate":"2022-04-05","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-0543","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-0543","severity":null,"published_at":"2022-03-15T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:17+00:00","note":null},{"source":"epss","external_id":"CVE-2019-0543","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-0543","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-0543","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-0543","severity":null,"published_at":"2019-01-08T21:29:00+00:00","modified_at":"2026-06-17T02:08:20+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"}