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CVE-2025-15556
CWE-494
High
79.8
RPSRPS range: 0–105; KEV-listed vulnerabilities can receive an exploitation amplifier.
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.
Source: NVD
Signals
- CVSS
- 7.5
- High · v3.1
- EPSS
- 1.77%
- Probability of exploitation in the next 30 days (FIRST)
- CISA KEV
- In CISA KEV since Feb 2026
- Fix commit
- No known fix commit
- Sources: MoreFixes, FreshFixes
- Weakness
- CWE-494
- Published
- 3 Feb 2026
- Last modified 13 Feb 2026
How to read these signals: RPS · EPSS · CISA KEV · Data sources
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Data as of 7 Oct 2026, 05:16 UK time