Out-of-bounds write in FortiADC - CVE-2025-48839

 

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

External References

Related Security Bulletins