Live › vulnerability › CVE-2025-15556
Go to dashboardNotepad++ updater (WinGUp) downloads update installers without verifying their integrity, so traffic can be intercepted or redirected. An attacker who controls that path can get a malicious installer run on the machine with the user's privileges.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Notepad++ Notepad++ | vendor | – | – |
| notepad-plus-plus notepad\+\+ | vendor | < 8.8.9 | 8.8.9 |
Unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
CISA 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.
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