{"id":"CVE-2019-1215","published":"2019-09-11T22:15:14Z","modified":"2026-06-17T02:28:05Z","title":"Microsoft Windows Privilege Escalation Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"An elevation of privilege vulnerability exists in the way that ws2ifsl.sys (Winsock) handles objects in memory, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1253, CVE-2019-1278, CVE-2019-1303.","provenance":"source","from":"NVD"},"summary":{"text":"A flaw in the way the Winsock kernel driver ws2ifsl.sys handles objects in memory allows privilege escalation in Microsoft Windows. An attacker with local access and low-privilege credentials can elevate their privileges without any user interaction, which may result in full control of the affected system.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T06:59:52Z"},"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":0.19254,"percentile":0.97326,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","ransomware":true,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2019-1215","provenance":"source"},"vulncheckKev":{"dateAdded":"2019-09-10","exploitedFirstSeen":"2019-09-10","ransomware":true,"evidence":[{"url":"https://isc.sans.edu/diary/25310","date":"2019-09-10"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"},{"url":"https://www.tenable.com/blog/contileaks-chats-reveal-over-30-vulnerabilities-used-by-conti-ransomware-affiliates","date":"2022-03-24"},{"url":"https://cybersecurityworks.com/howdymanage/uploads/file/RansomwareUpdate%20Report%202022%20Q1.pdf","date":"2022-04-12"},{"url":"https://www.securin.io/articles/all-about-conti-ransomware/","date":"2022-06-29"}],"evidenceTotal":5,"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-269","name":"Improper Privilege Management"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1215","tags":["Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1215","tags":["Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1215","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve","ai-mapping"],"basisDetail":"CTID attack_to_cve (Phase 1); claude-haiku-5-5: local privilege escalation via kernel driver flaw","mappingType":"uncategorized","evidence":[{"from":"description","quote":"elevation of privilege vulnerability exists in the way that ws2ifsl.sys","start":3,"end":74}],"confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: memory handling flaw enables code execution at elevated privilege","mappingType":"primary_impact","evidence":[{"from":"description","quote":"handles objects in memory, aka 'Windows Elevation of Privilege","start":85,"end":147}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2019-9783","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-9783","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[{"id":47935,"url":"https://www.exploit-db.com/exploits/47935","title":"Microsoft Windows 10 (19H1 1901 x64) - 'ws2ifsl.sys' Use After Free Local Privilege Escalation (kASLR kCFG SMEP)","type":"local","platform":"windows_x86-64","date":"2020-01-07","verified":false,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":1,"earliest":"2020-01-07"},"pocGithub":{"count":1,"skipped":0,"earliest":"2020-01-06","earliestUrl":"https://github.com/bluefrostsecurity/CVE-2019-1215","repos":[{"name":"bluefrostsecurity/CVE-2019-1215","url":"https://github.com/bluefrostsecurity/CVE-2019-1215","stars":149,"created":"2020-01-06"}]},"first":{"date":"2020-01-06","source":"PoC-in-GitHub","url":"https://github.com/bluefrostsecurity/CVE-2019-1215"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"primary","techniques":["T1059"],"provenance":"ai"},{"stage":"related","techniques":["T1068"],"provenance":"source"}],"timeline":[{"date":"2019-09-10","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://isc.sans.edu/diary/25310","provenance":"source"},{"date":"2019-09-11","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-1215","provenance":"source"},{"date":"2020-01-06","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub; 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1 PoC-in-GitHub repo"},{"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-269"}}