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TI-2023-25707 Aliases CVE-2023-47537GHSA-37rj-769r-rwrv

Improper certificate validation in Fortinet FortiOS

Priority LOW 21CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.

Summary

An improper certificate validation vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.15, FortiOS 6.4 all versions allows a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the FortiLink communication channel between the FortiOS device and FortiSwitch.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00214 11th 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

VendorProductAffected versionsFixed inStatusSource
FortinetFortiOS7.4.0 – 7.4.1; 7.2.0 – 7.2.6; 7.0.0 – 7.0.15; 6.4.0 – 6.4.16—No fix listedCNA
  • FortiOS VendorFortinet Affected 7.4.0 – 7.4.1; 7.2.0 – 7.2.6; 7.0.0 – 7.0.15; 6.4.0 – 6.4.16 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*7.0.0 to before 7.0.14; 7.2.0 – 7.2.6VulnerableFortinet
cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:*7.4.0VulnerableFortinet
cpe:2.3:o:fortinet:fortios:7.4.1:*:*:*:*:*:*:*7.4.1VulnerableFortinet
  • cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.14; 7.2.0 – 7.2.6 Vulnerable ·Fortinet
  • cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:* Versions 7.4.0 Vulnerable ·Fortinet
  • cpe:2.3:o:fortinet:fortios:7.4.1:*:*:*:*:*:*:* Versions 7.4.1 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-47537
  2. 2026-10-03 Alias added: GHSA-37rj-769r-rwrv

References

Advisory 1

  • 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
See all 276 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences