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CVE-2026-42171

CVE-2026-42171

CVSS 7.8 HIGHEPSS 0.2%CWE-427
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).
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Produtos afetados
Nullsoft · Nullsoft Scriptable Install System

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Referências
https://github.com/NSIS-Dev/nsis/blob/7359413009afd4f0fff472d841fc2f2cc0e0a5f8/Source/exehead/util.c#L475-L484https://github.com/NSIS-Dev/nsis/commit/8e6f02205d5f22da6c7855dbfe59b2af667330cahttps://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-gettempfilenamehttps://nsis.sourceforge.io/Docs/AppendixF.html#v3.12-cl