{"id":"CVE-2019-1069","published":"2019-06-12T14:29:04Z","modified":"2026-08-12T05:17:22Z","title":"Microsoft Task Scheduler Privilege Escalation Vulnerability","vendor":"Microsoft","product":"Task Scheduler","tier":"core","eol":null,"description":{"text":"An elevation of privilege vulnerability exists in the way the Task Scheduler Service validates certain file operations. An attacker who successfully exploited the vulnerability could gain elevated privileges on a victim system.\nTo exploit the vulnerability, an attacker would require unprivileged code execution on a victim system.\nThe security update addresses the vulnerability by correctly validating file operations.","provenance":"source","from":"NVD"},"summary":{"text":"The Microsoft Task Scheduler Service contains a flaw in how it validates certain file operations, which lives in the Task Scheduler product. An attacker who already has unprivileged code execution on a victim system can exploit it locally to gain elevated privileges.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:31:12Z"},"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":0.06117,"percentile":0.93408,"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-2019-1069","provenance":"source"},"vulncheckKev":{"dateAdded":"2021-04-16","exploitedFirstSeen":"2021-04-16","ransomware":true,"evidence":[{"url":"https://www.advintel.io/post/adversary-dossier-ryuk-ransomware-anatomy-of-an-attack-in-2021","date":"2021-04-16"},{"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"},{"url":"https://www.trendmicro.com/vinfo/us/security/news/ransomware-spotlight/ransomware-spotlight-targetcompany","date":"2023-06-05"}],"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-59","name":"Improper Link Resolution Before File Access"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1069","tags":["Patch","Vendor Advisory"]},{"url":"https://blog.0patch.com/2019/06/another-task-scheduler-0day-another.html","tags":["Exploit","Third Party Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1069","tags":["Patch","Vendor Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/119704","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1069","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 requires prior unprivileged code execution","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"To exploit the vulnerability, an attacker would require unprivileged code execution on a victim system","start":228,"end":330}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2019-9651","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-9651","exploited":true,"exploitedSince":"2022-03-15","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2019-06-03","earliestUrl":"https://github.com/S3cur3Th1sSh1t/SharpPolarBear","repos":[{"name":"S3cur3Th1sSh1t/SharpPolarBear","url":"https://github.com/S3cur3Th1sSh1t/SharpPolarBear","stars":37,"created":"2019-06-03"}]},"first":{"date":"2019-06-03","source":"PoC-in-GitHub","url":"https://github.com/S3cur3Th1sSh1t/SharpPolarBear"},"provenance":"source"},"exploitRefs":["https://blog.0patch.com/2019/06/another-task-scheduler-0day-another.html"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2019-06-03","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/S3cur3Th1sSh1t/SharpPolarBear","provenance":"source"},{"date":"2019-06-12","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-1069","provenance":"source"},{"date":"2021-04-16","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.advintel.io/post/adversary-dossier-ryuk-ransomware-anatomy-of-an-attack-in-2021","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-2019-9651","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"PoC-in-GitHub","daysToKev":1007},"priority":{"score":77.1,"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 2022 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":18.68,"detail":"percentile 0.9341"},{"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 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"}]}}