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CVE-2025-15556

Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification

Published: Feb 3, 2026Updated: Feb 13, 2026 Sources: CVE List NVD BDUCWE-494
7.5HIGH
NVD MITRE
EPSS Score
1.3%
Top 33.3%
CISA KEV
Active Exploitation
Since Feb 12, 2026
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-494

Affected Products

notepad-plus-plus
commercialaka notepad++, notepad+ plus, notepad plus plus
notepad\+\+On-prem
Consumer Software / productivity
notepad-plus-plusOn-prem
Consumer Software / productivity
Don Ho
commercial
Notepad++Mixed
Consumer Software / file-utility

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Feb 12, 2026
Remediation due:Mar 5, 2026

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://notepad-plus-plus.org/news/v889-released/
notepad-plus-plus.org
https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix
community.notepad-plus-plus.org
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab
github.com
and 5 more references View all →

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