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I. Basic Information for CVE-2026-42171
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability 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).
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对搜索路径元素未加控制
Source: NVD (National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
NullsoftNullsoft Scriptable Install System 3.06.1 ~ 3.12 -
II. Public POCs for CVE-2026-42171
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III. Intelligence Information for CVE-2026-42171
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IV. Related Vulnerabilities
Same product: Nullsoft Scriptable Install System
Same vendor: Nullsoft
Same weakness: CWE-427
V. Comments for CVE-2026-42171

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