CVE-2025-15556

Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification

Published Feb 3, 2026 CVSS 4.0 · 7.7 High EPSS 1.7% KEV · Listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
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\+\+
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

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\+\+
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'}

Type Values Removed Values Added
Metrics kev

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

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++
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Mar 5, 2026, 1:29 AM
Reserved
Feb 2, 2026, 10:25 PM
Status
Analyzed
Published
Feb 3, 2026, 1:15 AM
Modified
Jun 17, 2026, 8:38 AM