Fortinet FortiOS: Schwachstelle ermöglicht Privilegieneskalation
WID-SEC-2026-1492 · first 13.05.2026 · updated 13.05.2026 · CVSS 8,8
What it is about
FortiOS ist ein gehärtetes Betriebssystem für FortiGate Plattformen. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Fortinet FortiOS ausnutzen, um seine Privilegien zu erhöhen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- seine Privilegien zu erhöhen
Am I affected?
Affected according to the BSI:
- Fortinet FortiOS <7.2.12
- Fortinet FortiOS <7.4.9
- Fortinet FortiOS <7.6.4
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiOS 7.2.12
- Fortinet FortiOS 7.4.9
- Fortinet FortiOS 7.6.4
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-26-123 vom 2026-05-12 www.fortiguard.com
CVE: CVE-2025-53844
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.