Microsoft Windows Notepad App: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit Benutzerrechten
WID-SEC-2026-0365 · first 11.02.2026 · updated 20.02.2026 · CVSS 8,8
What it is about
Windows ist ein Betriebssystem von Microsoft. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft Windows Notepad App ausnutzen, um beliebigen Programmcode mit Benutzerrechten auszuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode mit Benutzerrechten auszuführen
Am I affected?
Affected according to the BSI:
- Microsoft Windows Notepad
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Install the updates provided by the vendor; details in the sources below.
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Microsoft Leitfaden für Sicherheitsupdates msrc.microsoft.com
- PoC auf GitHub vom 2026-02-19 github.com
CVE: CVE-2026-20841
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.