Fortinet FortiWeb: Schwachstelle ermöglicht Codeausführung
WID-SEC-2026-1122 · first 15.04.2026 · updated 16.04.2026 · CVSS 7,2
What it is about
FortiWeb ist eine Web Application Firewall von Fortinet. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Fortinet FortiWeb ausnutzen, um beliebigen Programmcode auszuführen.
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
- beliebigen Programmcode auszuführen
Am I affected?
Affected according to the BSI:
- Fortinet FortiWeb <8.0.4
- Fortinet FortiWeb <7.6.7
- Fortinet FortiWeb <7.4.12
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiWeb 8.0.4
- Fortinet FortiWeb 7.6.7
- Fortinet FortiWeb 7.4.12
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-26-127 vom 2026-04-14 fortiguard.fortinet.com
- GitHub Security Advisory GHSA-m3qh-6w2c-jgrx vom 2026-04-14 github.com
CVE: CVE-2026-40688
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.