CVE-2025-15556

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

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

13 Feb 2026, 14:03

Type Values Removed Values Added
CPE cpe:2.3:a:notepad-plus-plus:notepad\+\+:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
First Time Notepad-plus-plus
Notepad-plus-plus notepad\+\+
References () https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix - () https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix - Release Notes
References () https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab - () https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab - Patch
References () https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb - () https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb - Patch
References () https://notepad-plus-plus.org/news/hijacked-incident-info-update/ - () https://notepad-plus-plus.org/news/hijacked-incident-info-update/ - Patch, Vendor Advisory
References () https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification - () https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification - Third Party Advisory
References () https://notepad-plus-plus.org//news//clarification-security-incident/ - () https://notepad-plus-plus.org//news//clarification-security-incident/ - Vendor Advisory
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556 - US Government Resource

12 Feb 2026, 19:15

Type Values Removed Values Added
References
  • () https://notepad-plus-plus.org//news//clarification-security-incident/ -
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556 -

03 Feb 2026, 01:15

Type Values Removed Values Added
New CVE
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