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.
History

Thu, 12 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Notepad Plus Plus notepad\+\+
CPEs cpe:2.3:a:notepad_plus_plus:notepad\+\+:*:*:*:*:*:*:*:*
Vendors & Products Notepad Plus Plus notepad\+\+

Thu, 12 Feb 2026 19:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 12 Feb 2026 18:45:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-02-12T00:00:00+00:00', 'dueDate': '2026-03-05T00:00:00+00:00'}


Wed, 04 Feb 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Notepad++
Notepad++ notepad++
Notepad-plus-plus
Notepad-plus-plus notepad++
Notepad Plus Plus
Notepad Plus Plus notepad++
Vendors & Products Notepad++
Notepad++ notepad++
Notepad-plus-plus
Notepad-plus-plus notepad++
Notepad Plus Plus
Notepad Plus Plus notepad++

Tue, 03 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 03 Feb 2026 13:15:00 +0000

Type Values Removed Values Added
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.
Title Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
Weaknesses CWE-494
References
Metrics cvssV4_0

{'score': 7.7, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-02-03T00:50:29.516Z

Updated: 2026-02-12T23:20:24.480Z

Reserved: 2026-02-02T22:25:12.781Z

Link: CVE-2025-15556

cve-icon Vulnrichment

Updated: 2026-02-03T20:48:00.188Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-03T01:15:57.757

Modified: 2026-02-12T19:15:50.117

Link: CVE-2025-15556

cve-icon Redhat

No data.