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TI-2023-11390 Aliases CVE-2023-26209GHSA-f96f-6pqr-vx9w

Missing brute-force protection in Fortinet FortiDeceptor

Priority LOW 28CWE-307Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-307.

Summary

A improper restriction of excessive authentication attempts vulnerability [CWE-307] in Fortinet FortiDeceptor 3.1.x and before allows a remote unauthenticated attacker to partially exhaust CPU and memory via sending numerous HTTP requests to the login form.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01748 77th 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
FortinetFortiDeceptor3.1.0 – 3.1.1; 3.0.0 – 3.0.2; 2.1.0; 2.0.0; 1.1.0; 1.0.0 – 1.0.1—No fix listedCNA
  • FortiDeceptor VendorFortinet Affected 3.1.0 – 3.1.1; 3.0.0 – 3.0.2; 2.1.0; 2.0.0; 1.1.0; 1.0.0 – 1.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:fortinet:fortideceptor:*:*:*:*:*:*:*:*1.0.0 to before 3.2.0VulnerableFortinet
  • cpe:2.3:a:fortinet:fortideceptor:*:*:*:*:*:*:*:* Versions 1.0.0 to before 3.2.0 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-26209
  2. 2026-10-03 Alias added: GHSA-f96f-6pqr-vx9w

References

Advisory 1

  • TI-2020-17523 OS command injection in Fortinet FortiDeceptor CVSS 3.1HIGH 8.8
  • TI-2022-10502 Improper privilege management in Fortinet FortiDeceptor CVSS 3.1HIGH 8.8
  • TI-2020-05464 Insufficient session expiration in Fortinet FortiDeceptor CVSS 3.1HIGH 8.1
  • TI-2022-18000 Cross-site scripting in Fortinet FortiDeceptor CVSS 3.1HIGH 8.0
  • TI-2022-12537 Path traversal in Fortinet FortiDeceptor CVSS 3.1HIGH 8.1
  • TI-2022-12540 Missing brute-force protection in Fortinet FortiSandbox CVSS 3.1HIGH 7.5
See all 10 →

Sources

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