CVE Catalog

CVE-2026-42171

HighCVSS 7.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

11th percentile - higher than 11% of all known CVEs

Summary

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.

Risk Assessment

Attackers may exploit this vulnerability to gain elevated privileges on the system, potentially leading to unauthorized access to data or resources.

Recommendation

It is recommended to upgrade NSIS to version 3.12 or later to mitigate this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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).

Vulnerability data from NVD (NIST) · CISA KEV · EPSS