CVE-2025-15556

UNKNOWNKnown Exploited

CISA Known Exploited Vulnerability

https://notepad-plus-plus.org/news/clarification-security-incident/ ; https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix ; https://nvd.nist.gov/vuln/detail/CVE-2025-15556

Remediation deadline: March 5, 2026

Description

Notepad++ when using the WinGUp updater, contains a download of code without integrity check vulnerability that could allow an attacker to intercept or redirect update traffic to download and execute an attacker-controlled installer. This could lead to arbitrary code execution with the privileges of the user.

Timeline

Published:February 12th, 2026 12:00 AM

Last modified:February 12th, 2026 12:00 AM

Added to KEV:February 12th, 2026

CVSS Scoring

No CVSS v3 score available

Affected Software

From NVD CPE configuration data

Vendors

Notepad++

Products

Notepad++

Weaknesses (CWE)

CWE-494

References & Reports

Advisories, patches, and third-party reports

No references available.

Source: CISA KEV + NVD · Data may lag official sources by up to one minute