CVE-2026-126259 PUBLISHED

Assigner: fortinet
Reserved: 10.11.2026 Published: 11.11.2026 Updated: 12.11.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS Score: 9

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Fortinet
Product	FortiOS
Versions	Default: unaffected Version 8.0.0 is affected affected from 7.6.0 to 7.6.7 (incl.) affected from 7.4.0 to 7.4.12 (incl.) affected from 7.2.0 to 7.2.13 (incl.) affected from 7.0.0 to 7.0.19 (incl.)

Solutions

Upgrade to FortiOS version 8.0.1 or above Upgrade to FortiOS version 7.6.8 or above Upgrade to FortiOS version 7.4.13 or above Upgrade to FortiOS version 7.2.14 or above

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-273

Problem Types

Execute unauthorized code or commands CWE