A missing critical step in authentication vulnerability [CWE-304] in Fortinet FortiOS version 7.6.0 through 7…
- Severity
- High7.2CVSS 3.1, High
- EPSS
- 0.26%
- Published
- 8 Jul 2025
- Updated
- 17 Jun 2026
Description
Title, description and vendor guidance are quoted from the source records.
A missing critical step in authentication vulnerability [CWE-304] in Fortinet FortiOS version 7.6.0 through 7.6.1, 7.4.0 through 7.4.5, 7.2.0 through 7.2.10, and before 7.0.16 & FortiProxy version 7.6.0 through 7.6.1, 7.4.0 through 7.4.8, 7.2.0 through 7.2.13 and before 7.0.20 allows an API-user using api-key + PKI user certificate authentication to login even if the certificate is invalid.
Weakness: CWE-304
Known exploited
Not listed in CISA KEV as of the last check.
Exploit prediction
0.26% probability of exploitation in the next 30 days (percentile 16%).
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
What the source states, per branch
Versions matched by Patcharo
Fortinet FortiOSSource: Fortinet (CVE record)
| Branch | Affected | Fixed in |
|---|---|---|
| 7.6 | 7.6.0 – 7.6.1 | Fixed after 7.6.1 |
| 7.4 | 7.4.0 – 7.4.5 | Fixed after 7.4.5 |
| 7.2 | 7.2.0 – 7.2.10 | Fixed after 7.2.10 |
| 7.0 | 7.0.1 – 7.0.16 | Fixed after 7.0.16 |
Versions not listed are stated unaffected by the vendor.
Fortinet FortiProxySource: Fortinet (CVE record)
| Branch | Affected | Fixed in |
|---|---|---|
| 7.6 | 7.6.0 – 7.6.1 | Fixed after 7.6.1 |
| 7.4 | 7.4.0 – 7.4.8 | Fixed after 7.4.8 |
| 7.2 | 7.2.0 – 7.2.13 | Fixed after 7.2.13 |
| 7.0 | 7.0.0 – 7.0.20 | Fixed after 7.0.20 |
Versions not listed are stated unaffected by the vendor.
Workaround / Vendor remediation
Vendor remediation · FortiOS
Please upgrade to FortiOS version 7.6.3 or above Please upgrade to FortiOS version 7.4.6 or above Please upgrade to FortiOS version 7.2.11 or above Please upgrade to FortiOS version 7.0.17 or above Please upgrade to FortiProxy version 7.6.2 or above Please upgrade to FortiProxy version 7.4.9 or above Please upgrade to FortiProxy version 7.2.14 or above Please upgrade to FortiProxy version 7.0.21 or above
Vendor remediation · FortiProxy
Please upgrade to FortiOS version 7.6.3 or above Please upgrade to FortiOS version 7.4.6 or above Please upgrade to FortiOS version 7.2.11 or above Please upgrade to FortiOS version 7.0.17 or above Please upgrade to FortiProxy version 7.6.2 or above Please upgrade to FortiProxy version 7.4.9 or above Please upgrade to FortiProxy version 7.2.14 or above Please upgrade to FortiProxy version 7.0.21 or above
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Fortinet (CVE record)
- Fortinet (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC