High severity7.5CISA KEVOSV Advisory· Published Feb 3, 2026· Updated Jun 17, 2026
CVE-2025-15556
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
37.2.2, 7.3.1, v4, …+ 2 more
- (no CPE)range: 7.2.2, 7.3.1, v4, …
- cpe:2.3:a:notepad-plus-plus:notepad\+\+:*:*:*:*:*:*:*:*range: <8.8.9
- (no CPE)range: <8.8.9
Patches
Vulnerability mechanics
References
7- github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5abnvdPatch
- github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdbnvdPatch
- notepad-plus-plus.org/news/hijacked-incident-info-update/nvdPatchVendor Advisory
- notepad-plus-plus.org//news//clarification-security-incident/nvdVendor Advisory
- www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verificationnvdThird Party Advisory
- community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fixnvdRelease Notes
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
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