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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix	Release Notes
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab	Patch
https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb	Patch
https://notepad-plus-plus.org/news/hijacked-incident-info-update/	Patch Vendor Advisory
https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification	Third Party Advisory
https://notepad-plus-plus.org//news//clarification-security-incident/	Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556	US Government Resource

Configurations

Configuration 1 (hide)

cpe:2.3:a:notepad-plus-plus:notepad\+\+:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-03 01:15

Updated : 2026-02-13 14:03

NVD link : CVE-2025-15556

Mitre link : CVE-2025-15556

CVE.ORG link : CVE-2025-15556

JSON object : View

Products Affected

notepad-plus-plus

notepad\+\+

CWE

CWE-494

Download of Code Without Integrity Check

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