9.8

CVE-2026-44277: fortinet fortiauthenticator Improper Access Control

CVSS: 9.8v3.1CriticalModified
Published 12-05-2026Last modified 28-05-2026
Open JSON

Vulnerability summary

CVE-2026-44277 is a critical (CVSS 9.8) Improper Access Control vulnerability in fortinet fortiauthenticator. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.48%
0%100%
Low · -0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-05-2026
    PublishedVulnerability first disclosed.
  2. 28-05-2026
    Last modifiedVulnerability information updated.

Description

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 commands via crafted requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

-0.07 pp

From 0.55% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet1 product
  • fortiauthenticator8.0.2 | 8.0.0 | ≥ 6.6.0, ≤ 6.6.8 | ≥ 6.5.0, ≤ 6.5.6 | ≥ 6.4.0, ≤ 6.4.10 | ≥ 6.5.0, < 6.5.7 | ≥ 6.6.0, < 6.6.9 | ≥ 8.0.0, < 8.0.3

1 vendor · 1 product

References

1 links