Out-of-Bounds Write Vulnerability in Fortinet FortiADC Products
CVE-2025-48839

6.3MEDIUM

Key Information:

Vendor

Fortinet
Status
Fortiadc
Vendor
CVE Published:
18 November 2025

What is CVE-2025-48839?

An Out-of-bounds Write vulnerability exists in multiple versions of Fortinet's FortiADC, which may permit an authenticated attacker to execute arbitrary code. This weakness can be exploited through specially crafted HTTP requests, potentially leading to unauthorized actions within the affected system. Organizations using FortiADC versions 8.0.0 and earlier should assess their security posture and implement mitigations as necessary.

Affected Version(s)

FortiADC 8.0.0

FortiADC 7.6.0 <= 7.6.2

FortiADC 7.4.0 <= 7.4.7

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-225

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-48839 : Out-of-Bounds Write Vulnerability in Fortinet FortiADC Products