CVE-2026-126259

CRITICAL CVSS 3.1: 9.8 EPSS 0.65%
Updated Nov 13, 2026
Fortinet
Parameter Value
CVSS 9.8 (CRITICAL)
Type CWE-306 (Missing Authentication for Critical Function)
Vendor Fortinet
Public PoC No

A missing authentication for critical function vulnerability in Fortinet FortiOS 8.0.0, FortiOS 7.6.0 through 7.6.7, FortiOS 7.4.0 through 7.4.12, FortiOS 7.2.0 through 7.2.13 may allow an unauthenticated attacker with HA FGSP + standalone-config-sync, or autoscale to execute command as super admin via crafted HA packets.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1