What it is about

FortiOS ist ein gehärtetes Betriebssystem für FortiGate Plattformen. FortiProxy ist eine Web-Proxy Lösung. FortiSwitch bezeichnet die Ethernet Switch Produktfamilie von Fortinet. FortiWeb ist eine Web Application Firewall von Fortinet. Ein Angreifer kann eine Schwachstelle in Fortinet FortiOS, Fortinet FortiProxy, Fortinet FortiSwitch und Fortinet FortiWeb ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

Under what conditions?

The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.

What can happen in the worst case

An attacker could use the vulnerability to

• Sicherheitsvorkehrungen zu umgehen

Am I affected?

Affected according to the BSI:

• Fortinet FortiOS <7.6.4
• Fortinet FortiOS <7.4.9
• Fortinet FortiOS <7.2.12
• Fortinet FortiOS <7.0.18
• Fortinet FortiProxy <7.6.4
• Fortinet FortiProxy <7.4.11
• Fortinet FortiProxy <7.2.15
• Fortinet FortiProxy <7.0.22
• Fortinet FortiSwitch Manager <7.2.7
• Fortinet FortiSwitch Manager <7.0.6
• Fortinet FortiWeb <8.0.1
• Fortinet FortiWeb <7.6.5

and 1 more

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

• Fortinet FortiOS 7.6.4
• Fortinet FortiOS 7.4.9
• Fortinet FortiOS 7.2.12
• Fortinet FortiOS 7.0.18
• Fortinet FortiProxy 7.6.4
• Fortinet FortiProxy 7.4.11
• Fortinet FortiProxy 7.2.15
• Fortinet FortiProxy 7.0.22
• Fortinet FortiSwitch Manager 7.2.7
• Fortinet FortiSwitch Manager 7.0.6
• Fortinet FortiWeb 8.0.1
• Fortinet FortiWeb 7.6.5

Is the vulnerability already being exploited?

• CVE-2025-59718: exploited in the wild according to CISA, in the catalogue since 16.12.2025.