Out-of-Bounds Write Vulnerability in Fortinet FortiOS Products
CVE-2025-53844

8.3HIGH

Key Information:

Vendor

Fortinet
Status
FortiOS
Vendor
CVE Published:
12 May 2026

What is CVE-2025-53844?

An out-of-bounds write vulnerability exists in various versions of Fortinet's FortiOS, allowing attackers to craft specially designed packets. This may enable unauthorized execution of code or commands, leading to serious security risks. Users are advised to update their FortiOS versions promptly to safeguard against potential exploits associated with this vulnerability.

Affected Version(s)

FortiOS 7.6.0 <= 7.6.3

FortiOS 7.4.0 <= 7.4.8

FortiOS 7.2.0 <= 7.2.11

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-123

CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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