NSIS (Nullsoft Scriptable Install System) 3.06.1 before 3.12 sometimes uses the Low IL temp directory when executing as SYSTEM, allowing local attackers to gain privileges (if they can cause my_GetTempFileName to return 0, as shown in the references).
History

Tue, 28 Apr 2026 06:00:00 +0000

Type Values Removed Values Added
Title Low IL Temp Directory Path Exposure Allows Local Privilege Escalation

Sat, 25 Apr 2026 02:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 24 Apr 2026 21:45:00 +0000

Type Values Removed Values Added
Description NSIS (Nullsoft Scriptable Install System) 3.06.1 before 3.12 sometimes uses the Low IL temp directory when executing as SYSTEM, allowing local attackers to gain privileges (if they can cause my_GetTempFileName to return 0, as shown in the references).
First Time appeared Nullsoft
Nullsoft nullsoft Scriptable Install System
Weaknesses CWE-427
CPEs cpe:2.3:a:nullsoft:nullsoft_scriptable_install_system:*:*:*:*:*:*:*:*
Vendors & Products Nullsoft
Nullsoft nullsoft Scriptable Install System
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-04-24T21:20:35.525Z

Updated: 2026-04-25T19:33:05.317Z

Reserved: 2026-04-24T21:20:35.145Z

Link: CVE-2026-42171

cve-icon Vulnrichment

Updated: 2026-04-25T01:56:33.733Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-24T22:16:01.540

Modified: 2026-05-18T14:33:16.243

Link: CVE-2026-42171

cve-icon Redhat

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