Missing authentication in Fortinet FortiOS
Priority LOW 38CWE-306Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.
Summary
A missing authentication for critical function vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiOS 6.2.9 through 6.2.17 allows attacker to execute unauthorized code or commands via specially crafted packets.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00283 20th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Fortinet | FortiOS | 7.6.0 – 7.6.3; 7.4.0 – 7.4.8; 7.2.0 – 7.2.11; 7.0.0 – 7.0.17; 6.4.0 – 6.4.16; 6.2.9 – 6.2.17 | — | No fix listed | CNA |
- FortiOS VendorFortinet Affected 7.6.0 – 7.6.3; 7.4.0 – 7.4.8; 7.2.0 – 7.2.11; 7.0.0 – 7.0.17; 6.4.0 – 6.4.16; 6.2.9 – 6.2.17 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 6.2.9 to before 7.0.18; 7.2.0 to before 7.2.12; 7.4.0 to before 7.4.9; 7.6.0 to before 7.6.4 | Vulnerable | Fortinet |
- cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 6.2.9 to before 7.0.18; 7.2.0 to before 7.2.12; 7.4.0 to before 7.4.9; 7.6.0 to before 7.6.4 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-53847
- 2026-10-03 Alias added: GHSA-v55w-rvx7-pq26
References
More Fortinet Fortios vulnerabilities
- TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
- TI-2024-36904 Authentication bypass in Fortinet FortiOS KEVCVSS 3.1CRITICAL 9.8
- TI-2024-15234 A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through… KEVCVSS 3.1CRITICAL 9.8
- TI-2024-14448 Out-of-bounds write in Fortinet FortiOS KEVCVSS 3.1CRITICAL 9.8
- TI-2023-12585 Heap-based buffer overflow in Fortinet FortiOS-6K7K KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2025-53847 · CVE Program
- CVE-2025-53847 · NVD
- FIRST EPSS
- GHSA-v55w-rvx7-pq26 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences