CVE-2025-15556

Notepad++ Download of Code Without Integrity Check Vulnerability

Notepad\+\+

Notepad++ versions prior to 8.8.9, when using the WinGUp updater, contain an update integrity verification vulnerability where downloaded update metadata and installers are not cryptographically verified. An attacker able to intercept or redirect update traffic can cause the updater to download and execute an attacker-controlled installer, resulting in arbitrary code execution with the privileges of the user.

3. Feb 2026

Ausgewertete Quellen

• Hersteller
  https://notepad-plus-plus.org//news//clarification-security-incident/
• Hersteller
  https://notepad-plus-plus.org/news/hijacked-incident-info-update/
• Hinweis
  https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification
• CISA
  https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556
• CISA
  Notepad++ Download of Code Without Integrity Check Vulnerability
• NVD
  CVE-2025-15556