CVE-2026-126253 PUBLISHED

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

A authentication bypass by primary weakness vulnerability in Fortinet FortiOS 8.0.0 through 8.0.1, 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 to broadcast LSA via specially crafted request

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H/E:P/RL:O/RC:C
CVSS Score: 9.3

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

CVSS 3.1

Product Status

Vendor	Fortinet
Product	FortiOS
Versions	Default: unaffected affected from 8.0.0 to 8.0.1 (incl.) 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 7.0.1 to 7.0.19 (incl.)

Solutions

Upgrade to FortiOS version 8.0.2 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-26-267

Problem Types

Improper access control CWE