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CVE-2025-43715

HIGH
8.1
CVSS Score
Published: April 17, 2025 at 12:00 AM UTC
Updated: October 15, 2026 at 02:18 AM UTC
1 product affected across 1 vendorNullsoft Scriptable Install System

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Severity
HIGH8.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Nullsoft Scriptable Install System (NSIS) before 3.11 on Windows allows local users to escalate privileges to SYSTEM during an installation, because the temporary plugins directory is created under %WINDIR%\temp and unprivileged users can place a crafted executable file by winning a race condition. This occurs because EW_CREATEDIR does not always set the CreateRestrictedDirectory error flag.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nullsoft Scriptable Install System· Nullsoft
90%
0
Affected range stops below 3.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Source: [email protected]
https://nsis.sourceforge.io/Docs/AppendixF.html#v3.11-rl
Source: [email protected]
https://sourceforge.net/p/nsis/bugs/1315/
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-563922.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHmitre
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-754

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