Missing Authentication for Critical Function in FortiOS - CVE-2025-53847
Published: April 14, 2026
Vulnerability identifier: #VU126000
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-53847
CWE-ID: CWE-306
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The vulnerability exists due to missing authentication for critical function in CAPWAP daemon. A remnote unauthenticated attacker on the same local IP subnet can write device configuration via specially crafted requests. To be successful, this attack requires the targeted FortiGate device to run a specific, non default configuration.
Affected software
FortiOS
How to mitigate CVE-2025-53847
Install updates from vendor's website.
FortiOS - addressed in versions 7.0.18, 7.2.12, 7.4.9, 7.6.4