Fortinet FortiWeb: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen
WID-SEC-2026-2810 · first 13.08.2026 · updated 13.08.2026 · CVSS 9,8
What it is about
FortiWeb ist eine Web Application Firewall von Fortinet. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Fortinet FortiWeb ausnutzen, um Sicherheitsvorkehrungen zu umgehen und Daten zu manipulieren.
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
- Daten zu manipulieren
Am I affected?
Affected according to the BSI:
- Fortinet FortiWeb <8.0.3
- Fortinet FortiWeb <7.6.7
- Fortinet FortiWeb <7.4.12
- Fortinet FortiWeb <7.2.13
- Fortinet FortiWeb <7.6.6
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiWeb 8.0.3
- Fortinet FortiWeb 7.6.7
- Fortinet FortiWeb 7.4.12
- Fortinet FortiWeb 7.2.13
- Fortinet FortiWeb 7.6.6
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-26-158 vom 2026-08-12 www.fortiguard.com
- FortiGuard Labs PSIRT Advisory FG-IR-26-157 vom 2026-08-12 www.fortiguard.com
CVE: CVE-2026-26035, CVE-2026-70466
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.