{"id":"CVE-2019-0543","published":"2019-01-08T21:29:00Z","modified":"2026-06-17T02:08:20Z","title":"Microsoft Windows Privilege Escalation Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"An elevation of privilege flaw exists in Microsoft Windows, where the operating system improperly handles authentication requests. An attacker with local access and low-privileged credentials can exploit it without any user interaction to gain elevated privileges on the affected system.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:01:06Z"},"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":0.04679,"percentile":0.91743,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2022-03-15","dueDate":"2022-04-05","ransomware":true,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2019-0543","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-03-15","exploitedFirstSeen":"2022-03-15","ransomware":true,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-03-15"},{"url":"https://www.tenable.com/blog/contileaks-chats-reveal-over-30-vulnerabilities-used-by-conti-ransomware-affiliates","date":"2022-03-24"},{"url":"https://www.securin.io/articles/all-about-conti-ransomware/","date":"2022-06-29"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"references":[{"url":"http://www.securityfocus.com/bid/106408","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0543","tags":["Patch","Vendor Advisory"]},{"url":"https://www.exploit-db.com/exploits/46156/","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/106408","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0543","tags":["Patch","Vendor Advisory"]},{"url":"https://www.exploit-db.com/exploits/46156/","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0543","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 via improper authentication handling","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"An elevation of privilege vulnerability exists when Windows improperly handles authentication requests","start":0,"end":102}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1134","name":"Access Token Manipulation","tactics":["privilege-escalation","stealth"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: privilege elevation yields access token manipulation","mappingType":"primary_impact","evidence":[{"from":"description","quote":"elevation of privilege vulnerability exists when Windows improperly handles authentication requests","start":3,"end":102}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2019-1314","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-1314","exploited":true,"exploitedSince":"2022-03-15","provenance":"source"},"exploits":[{"id":46156,"url":"https://www.exploit-db.com/exploits/46156","title":"Microsoft Windows 10 - SSPI Network Authentication Session 0 Privilege Escalation","type":"local","platform":"windows","date":"2019-01-14","verified":true,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":1,"earliest":"2019-01-14"},"first":{"date":"2019-01-14","source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/46156"},"provenance":"source"},"exploitRefs":["https://www.exploit-db.com/exploits/46156/"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1134"],"provenance":"ai"}],"timeline":[{"date":"2019-01-08","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-0543","provenance":"source"},{"date":"2019-01-14","kind":"exploit-public","label":"First public exploit: Exploit-DB (EDB-46156)","url":"https://www.exploit-db.com/exploits/46156","provenance":"source"},{"date":"2022-03-15","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","provenance":"source"},{"date":"2022-03-15","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-03-15","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-1314","provenance":"source"}],"speed":{"daysToPublicExploit":6,"firstExploitFrom":"Exploit-DB","daysToKev":1162},"priority":{"score":76.8,"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 1689 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":18.35,"detail":"percentile 0.9174"},{"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"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 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-287"}}