{"id":"CVE-2021-33436","aliases":["EUVD-2021-20140","GHSA-669x-j2pw-grf8"],"status":"published","title":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation...","description":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\\SYSTEM.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00287,"percentile":0.21405,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-04-28T10:57:43Z","modified":"2026-06-17T03:54:32Z","products":[{"vendor":"nomachine","product":"nomachine"}],"references":[{"url":"https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.md","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://knowledgebase.nomachine.com/TR05S10236","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://knowledgebase.nomachine.com/SU05S00224","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://knowledgebase.nomachine.com/SU05S00223","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33436"},{"url":"https://github.com/advisories/GHSA-669x-j2pw-grf8"}],"sources":{"cve":[{"id":"CVE-2021-33436","description":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\\SYSTEM.","status":"published","published":"2022-04-28T10:57:43Z","modified":"2024-08-03T23:50:42.793Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20140","description":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\\SYSTEM.","status":"published","published":"2022-04-28T10:57:43Z","modified":"2024-08-03T23:50:42Z","updated_at":"2026-11-03T03:24:34.304953Z"}],"ghsa":[{"id":"GHSA-669x-j2pw-grf8","title":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation...","description":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\\SYSTEM.","status":"published","published":"2022-04-29T00:00:25Z","modified":"2023-01-30T05:00:30Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:46:13.0899Z"}],"nvd":[{"id":"CVE-2021-33436","description":"NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\\SYSTEM.","status":"published","published":"2022-04-28T11:15:07.72Z","modified":"2026-06-17T03:54:32.867Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.2,"vector":"AV:L/AC:H/Au:N/C:C/I:C/A:C","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:06.029737Z"}]}}