LANCOM LCOS FX: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen
WID-SEC-2026-0461 · first 19.02.2026 · updated 19.02.2026 · CVSS 6,5
What it is about
LCOS ist das Betriebssystem für das gesamte LANCOM Produktportfolio. LCOS is the operating system for the whole LANCOM product portfolio. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in LANCOM LCOS FX ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
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
- Sicherheitsvorkehrungen zu umgehen
Am I affected?
Affected according to the BSI:
- LANCOM LCOS FX <11.1 RU7
- LANCOM LCOS FX <11.2 Rel
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- LANCOM LCOS FX 11.1 RU7
- LANCOM LCOS FX 11.2 Rel
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)
- LANCOM Sicherheitshinweise vom 2026-02-18 www.lancom-systems.de
- LANCOM Knowledge Base vom 2026-02-18 knowledgebase.lancom-systems.de
CVE: CVE-2025-67832
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.