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CVE-2026-42171

HIGH CVSS: 7.8 Published: 2026-04-24 Modified: 2026-06-17

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).

Affected Platforms

Nullsoft Nullsoft Scriptable Install System

Weakness Type

CWE-427

References