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CVE-2025-15556
Good to know:
Date: February 2, 2026
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.
Severity Score
Related Resources (7)
Severity Score
Weakness Type (CWE)
Download of Code Without Integrity Check
CWE-494Top Fix
Upgrade Version
Upgrade to version https://github.com/notepad-plus-plus/notepad-plus-plus.git - v8.8.9;https://github.com/notepad-plus-plus/wingup.git - v5.3.8
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | HIGH |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | REQUIRED |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | HIGH |
| Availability (A): | HIGH |