2.7

CVE-2025-59923: fortinet fortiauthenticator Improper Access Control

CVSS: 2.7v3.1LowModified
Published 09-12-2025Last modified 14-01-2026
Open JSON

Vulnerability summary

CVE-2025-59923 is a low (CVSS 2.7) Improper Access Control vulnerability in fortinet fortiauthenticator. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% of scored vulnerabilities.

Overall risk
11/100
0100
Low · default modelHow is this calculated?
CVSS score
2.7/10
010
Low · v3.1 (NVD)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 14-01-2026
    Last modifiedVulnerability information updated.

Description

An improper access control 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 an authenticated attacker with at least read-only admin permission to obtain the credentials of other administrators' messaging services via crafted requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.21%

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
  • fortiauthenticator≥ 6.6.0, ≤ 6.6.6 | ≥ 6.5.0, ≤ 6.5.6 | ≥ 6.4.0, ≤ 6.4.10 | ≥ 6.3.0, ≤ 6.6.4

1 vendor · 1 product

References

1 links