Improper Check for Unusual or Exceptional Conditions in Nullsoft Scriptable Install System (NSIS) - CVE-2025-43715

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Main Vulnerability Database Vulnerabilities #VU115188

Improper Check for Unusual or Exceptional Conditions in Nullsoft Scriptable Install System (NSIS) - CVE-2025-43715

Published: September 12, 2025


Vulnerability identifier: #VU115188
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-43715
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Nullsoft
Affected software:
Nullsoft Scriptable Install System (NSIS)

Detailed vulnerability description

The vulnerability allows a local attacker to escalate privileges on the system.

The vulnerability exists due to EW_CREATEDIR does not always set the CreateRestrictedDirectory error flag. A local attacker can win a race condition and gain elevated privileges on the target system.


How to mitigate CVE-2025-43715

Install updates from vendor's website.

Sources