CVE-2025-53847

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-14 · updated 2026-10-07
Weakness: CWE-306

Description

A missing authentication for critical function vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiOS 6.2.9 through 6.2.17 allows attacker to execute unauthorized code or commands via specially crafted packets.

Affected products

Fortinet FortiOS (FortiGate): from 6.2.9 before 7.0.18; from 7.2.0 before 7.2.12; from 7.4.0 before 7.4.9; from 7.6.0 before 7.6.4 — fixed in 7.0.18, 7.2.12, 7.4.9, 7.6.4

How to fix

Upgrade to a fixed version: Fortinet FortiOS (FortiGate) 7.0.18, 7.2.12, 7.4.9, 7.6.4. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-53847 or the next vulnerability affects your stack