Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
notepad-plus-plus notepad-plus-plus
Default version status: unaffected
0 to < 8.8.9affected
References
- https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix ↗
- https://notepad-plus-plus.org/news/hijacked-incident-info-update/ ↗
- https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab ↗
- https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb ↗
- https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification ↗
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556 ↗
- https://notepad-plus-plus.org//news//clarification-security-incident/ ↗