CVE-2024-27303

Code execution via NSIS command search order

Published Mar 6, 2024 · Updated Aug 13, 2024

Untrusted search path in Electron Userland electron-builder before 24.13.2 allows local users to execute code through Windows NSIS installers. The allowOnlyOneInstallerInstance.nsh template passes bare cmd invocations to NSExec, which searches the installer's directory before the system path. Exploitation requires local placement of a malicious cmd.exe beside an installer and a user to run it; the payload then executes with installer privileges.

CVSS severity7.3
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted search path in Electron Userland electron-builder before 24.13.2 allows local users to execute code through Windows NSIS installers. The allowOnlyOneInstallerInstance.nsh template passes bare cmd invocations to NSExec, which searches the installer's directory before the system path. Exploitation requires local placement of a malicious cmd.exe beside an installer and a user to run it; the payload then executes with installer privileges.

The record

CVE
CVE-2024-27303
Published
Mar 6, 2024
Updated
Aug 13, 2024
Vendor
Electron Userland
Product
electron-builder
Classifications
CWE-427, CWE-426, T1574.008
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <24.13.2
  2. Affected versionversion=< 24.13.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Electron Userland · electron-builderversion=0 <24.13.2; version=< 24.13.2

Published CVSS scores

7.3GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
CWE-426Untrusted Search Path
T1574.008Path Interception by Search Order Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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