Fortinet FortiOS: Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-3933 · first 14.10.2026 · updated 27.10.2026 · CVSS 7,5
What it is about
FortiOS ist ein gehärtetes Betriebssystem für FortiGate Plattformen. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Fortinet FortiOS ausnutzen, um einen Denial of Service Angriff durchzuführen.
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
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Fortinet FortiOS <7.6.7
- Fortinet FortiOS <8.0.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiOS 7.6.7
- Fortinet FortiOS 8.0.1
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)
- FortiGuard Labs PSIRT Advisory FG-IR-26-181 vom 2026-10-13 www.fortiguard.com
CVE: CVE-2026-106174
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.