Lenovo BIOS: Mehrere Schwachstellen
WID-SEC-2026-0134 · first 16.01.2026 · updated 16.01.2026 · CVSS 7,8
What it is about
Das BIOS ist die Firmware bei IBM PC kompatiblen Computern. Ein lokaler Angreifer kann mehrere Schwachstellen in Lenovo BIOS ausnutzen, um beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu verursachen, Daten zu verändern oder Secure-Boot-Schutzmaßnahmen zu umgehen.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Code auszuführen
- einen Denial-of-Service-Zustand zu verursachen
- Daten zu verändern oder Secure-Boot-Schutzmaßnahmen zu umgehen
Am I affected?
Affected according to the BSI:
- Lenovo BIOS L13 Gen 6
- Lenovo BIOS L13 Gen 6 2-in-1
- Lenovo BIOS L14 Gen 6
- Lenovo BIOS L16 Gen 2 ThinkPads
- Lenovo BIOS
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)
- Lenovo Security Advisory vom 2026-01-15 support.lenovo.com
CVE: CVE-2025-47348, CVE-2026-0421
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.