Stack-based buffer overflow in FortiManager - CVE-2025-54820
Published: March 10, 2026
Vulnerability identifier: #VU123729
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-54820
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the fgtupdates service. A remote unauthenticated attacker can send specially crafted requests to the affected server, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
FortiManager
How to mitigate CVE-2025-54820
Install updates from vendor's website.
FortiManager - addressed in versions 7.2.11, 7.4.3