CVE-2025-15556
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.7
- CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 1.71%
- CISA KEV
- Known exploited vulnerability
- CWE
- CWE-494
- Published
- 2026-02-03
- Last modified
- 2026-03-05
Affected products
- notepad-plus-plus notepad-plus-plus
Weakness type
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