Out-of-bounds write in FortiADC - CVE-2025-48839
Published: November 18, 2025
Vulnerability identifier: #VU118599
CSH Severity: Low
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-48839
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in multiple endpoints. An authenticated attacker can execute arbitrary code via specially crafted HTTP requests.
Affected software
FortiADC
How to mitigate CVE-2025-48839
Install update from vendor's website.
FortiADC - addressed in versions 7.4.8, 7.6.3, 8.0.1