CVE Database · CVE-2025-15556
CVSS v3.1
7.5
CVSS v4.0
7.7
EPSS
1.27%
Published
Feb 2, 2026
Modified
Feb 13, 2026
CISA Known Exploited Vulnerability
Added: 2026-02-12 · Due: 2026-03-05
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public PoC / Exploit (2)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
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.
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HWeaknesses (CWE)
Affected Products (1)
References (7)