Is there a public exploit for CVE-2026-126259?

No public exploit for CVE-2026-126259 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-126259?

CVE-2026-126259 scores CVSS 9 (v3.1), rated critical.

What does CVE-2026-126259 affect?

CVE-2026-126259 affects Fortinet FortiOS.

9.0 Critical

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…

CVE-2026-126259

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.

Assessment

CVSS: 9 (v3.1)
Severity: Critical
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 11 November 2026
Last updated: 11 November 2026
Affected: Fortinet · FortiOS
Assigner: fortinet

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

At the source

EUVD (ENISA)

References

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

Community proofs of concept

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