February 12, 2026 · Applied Cybernetics Group
CVE-2025-15556 — Notepad++ Notepad++
Notepad++ Download of Code Without Integrity Check Vulnerability
- Added to KEV
2026-02-12- Federal due date
2026-03-05- Vendor
- Notepad++
- Product
- Notepad++
- EPSS
- 66.4th percentile (score 0.013, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-15556
CISA short 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.
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.