Actively exploited in the wild
Notepad++ Download of Code Without Integrity Check Vulnerability
Notepad++ - Notepad++ · Listed in the CISA KEV since 2026-02-12. This indicates confirmed attacks in production environments.
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.
CVE-2025-15556
HighCVSS 7.5KEVSummary
Wersje Notepad++ przed 8.8.9, korzystające z aktualizatora WinGUp, zawierają podatność na weryfikację integralności aktualizacji, w której pobrane metadane aktualizacji i instalatory nie są weryfikowane kryptograficznie. Atakujący, który jest w stanie przechwycić lub przekierować ruch aktualizacyjny, może spowodować pobranie i wykonanie instalatora kontrolowanego przez niego, co prowadzi do wykonania dowolnego kodu z uprawnieniami użytkownika.
Risk Assessment
Podatność ta stwarza ryzyko wykonania złośliwego kodu na systemach użytkowników, co może prowadzić do utraty danych, przejęcia kontroli nad systemem lub innych poważnych incydentów bezpieczeństwa.
Recommendation
Zaleca się aktualizację Notepad++ do wersji 8.8.9 lub nowszej oraz weryfikację źródeł aktualizacji, aby zminimalizować ryzyko przechwycenia ruchu aktualizacyjnego.
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Original NVD description (English source)
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.