ACTIVELY EXPLOITED
CVE-2025-15556: Notepad++ Download of Code Without Integrity Check Vulnerability
| Vendor | Notepad++ |
|---|---|
| Product | Notepad++ |
| Actively exploited | Yes |
| Added to CISA KEV | 12 Feb 2026 |
| CISA federal deadline | 5 Mar 2026 |
| Weakness (CWE) | CWE-494 |
Required action (CISA's text)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description (NVD)
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.
SOURCES
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.