Fortinet FortiClient: Schwachstelle ermöglicht Codeausführung
WID-SEC-2026-2811 · first 13.08.2026 · updated 13.08.2026 · CVSS 8,1
What it is about
FortiClient ist ein Endgeräteschutz mit einem integrierten VPN-Client. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Fortinet FortiClient ausnutzen, um beliebigen Programmcode 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 auszuführen
Am I affected?
Affected according to the BSI:
- Fortinet FortiClient <7.4.4
- Fortinet FortiClient <7.2.12
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiClient 7.4.4
- Fortinet FortiClient 7.2.12
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-26-156 vom 2026-08-12 www.fortiguard.com
CVE: CVE-2026-70465
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.