{"id":"CVE-2020-13162","aliases":["EUVD-2020-5435","GHSA-jc87-47xg-wmhr"],"status":"published","title":"A time-of-check time-of-use vulnerability in PulseSecureService.exe in Pulse Secure Client...","description":"A time-of-check time-of-use vulnerability in PulseSecureService.exe in Pulse Secure Client versions prior to 9.1.6 down to 5.3 R70 for Windows (which runs as NT AUTHORITY/SYSTEM) allows unprivileged users to run a Microsoft Installer executable with elevated privileges.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00793,"percentile":0.56627,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-367"],"published":"2020-06-16T19:41:18Z","modified":"2026-06-17T02:52:43Z","exploits":[{"source":"pocgithub","id":"redtimmy/tu-TOCTOU-kaiu-TOCMEU-CVE-2020-13162-","title":"redtimmy/tu-TOCTOU-kaiu-TOCMEU-CVE-2020-13162-","date":"2020-09-02","url":"https://github.com/redtimmy/tu-TOCTOU-kaiu-TOCMEU-CVE-2020-13162-"}],"products":[{"vendor":"pulsesecure","product":"pulse_secure_desktop_client"},{"vendor":"pulsesecure","product":"pulse_secure_installer_service"}],"references":[{"url":"https://kb.pulsesecure.net/?atype=sa","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://twitter.com/sepcali/status/1262551597990711296","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2020/Jun/25","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Mailing List","Third Party Advisory"]},{"url":"https://www.redtimmy.com/privilege-escalation/pulse-secure-client-for-windows-9-1-6-toctou-privilege-escalation-cve-2020-13162/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/158117/Pulse-Secure-Client-For-Windows-Local-Privilege-Escalation.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44503","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://twitter.com/gsepcali/status/1262551597990711296","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://twitter.com/gsepcali/status/1272927080909623297","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2020/Sep/15","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/159065/Pulse-Secure-Windows-Client-Privilege-Escalation.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-13162"},{"url":"https://github.com/sepcali"},{"url":"https://twitter.com/sepcali"},{"url":"https://twitter.com/sepcali/status/1262551277940211712"},{"url":"https://twitter.com/sepcali/status/1262551336152948738"},{"url":"https://www.redtimmy.com/privilege-escalation/pulse-secure-client-for-windows-9-1-6-toctou-privilege-escalation-cve-2020-13162"},{"url":"https://github.com/advisories/GHSA-jc87-47xg-wmhr"}],"sources":{"cve":[{"id":"CVE-2020-13162","description":"A time-of-check time-of-use vulnerability in PulseSecureService.exe in Pulse Secure Client versions prior to 9.1.6 down to 5.3 R70 for Windows (which runs as NT AUTHORITY/SYSTEM) allows unprivileged users to run a Microsoft Installer executable with elevated 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