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

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

Type Values Removed Values Added
First Time appeared Notepad++
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Vendors & Products Notepad++
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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: 2026-02-03T20:48:02.803Z

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: 2026-02-03T16:44:03.343

Link: CVE-2025-15556

cve-icon Redhat

No data.