7.2

CVE-2026-21743: fortinet fortiauthenticator Missing Authorization

Analyzed
Published 10-02-2026Last modified 12-02-2026

Vulnerability summary

CVE-2026-21743 is a high (CVSS 7.2) Missing Authorization vulnerability in fortinet fortiauthenticator. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.5% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.2/10
010
High · v3.1 (NVD)
EPSS score
0.38%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 10-02-2026
    PublishedVulnerability first disclosed.
  2. 12-02-2026
    Last modifiedVulnerability information updated.

Description

A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow a read-only user to make modification to local users via a file upload to an unprotected endpoint.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.35% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet1 product
  • fortiauthenticator≥ 6.6.0, ≤ 6.6.6 | ≥ 6.5.0, ≤ 6.5.7 | ≥ 6.4.0, ≤ 6.4.11 | ≥ 6.3.0, ≤ 6.3.5 | ≥ 6.3.0, < 6.6.7

1 vendor · 1 product

References

1 links