Unrated severityCISA KEVOSV Advisory· Published Feb 3, 2026· Updated Mar 5, 2026
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
CVE-2025-15556
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
27.2.2, 7.3.1, v4, …+ 1 more
- (no CPE)range: 7.2.2, 7.3.1, v4, …
- (no CPE)range: <8.8.9
Patches
Vulnerability mechanics
References
5- community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fixmitrerelease-notespatch
- github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5abmitrepatch
- github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdbmitrepatch
- notepad-plus-plus.org/news/hijacked-incident-info-update/mitrevendor-advisory
- www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verificationmitrethird-party-advisory
News mentions
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