VULNERABILITY INTELLIGENCE

CVE-2025-15556

CVSS score7.5 HIGH
EPSS probability1.75%
CISA KEVKnown exploited vulnerability
Published2026-02-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Known Exploited Vulnerability

Notepad++ Download of Code Without Integrity Check Vulnerability

Vendor / product: Notepad++ / Notepad++

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-494

Primary references