What is CVE-2026-44277?

CVE-2026-44277 is a critical-severity vulnerability in Fortinet Fortiauthenticator, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-05-12.

How severe is CVE-2026-44277?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-44277 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Fortinet Fortiauthenticator

CVE-2026-44277

A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticator 6.6.0 through 6.6.8, FortiAuthenticator 6.5.0 through 6.5.6 may allow attacker to execute unauthorized code or comma…

EPSS: 0.001 (28.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortiauthenticator — versions 8.0.2, 8.0.0, 6.6.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

Public proof-of-concept exploits

0xBlackash/CVE-2026-44277

References

psirt@fortinet.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-44277?: CVE-2026-44277 is a critical-severity vulnerability in Fortinet Fortiauthenticator, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-05-12.
How severe is CVE-2026-44277?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-44277 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.