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TI-2023-21505 Aliases CVE-2023-40721GHSA-8hp7-6pv7-c4rv

A use of externally-controlled format string vulnerability [CWE-134] vulnerability in…

Priority LOW 30CWE-134Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-134 and the CVSS impact.

Summary

A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00242 15th 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
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FortinetFortiPAM1.1.0 – 1.1.2; 1.0.0 – 1.0.3—No fix listedCNA
FortinetFortiSwitchManager7.2.0 – 7.2.2; 7.0.0 – 7.0.2—No fix listedCNA
FortinetFortiOS7.4.0; 7.2.0 – 7.2.5; 7.0.0 – 7.0.13; 6.4.0 – 6.4.16; 6.2.0 – 6.2.17—No fix listedCNA
FortinetFortiProxy7.4.0; 7.2.0 – 7.2.6; 7.0.0 – 7.0.14; 2.0.0 – 2.0.14; 1.2.0 – 1.2.13—No fix listedCNA
  • FortiPAM VendorFortinet Affected 1.1.0 – 1.1.2; 1.0.0 – 1.0.3 Fixed in — No fix listed CNA
  • FortiSwitchManager VendorFortinet Affected 7.2.0 – 7.2.2; 7.0.0 – 7.0.2 Fixed in — No fix listed CNA
  • FortiOS VendorFortinet Affected 7.4.0; 7.2.0 – 7.2.5; 7.0.0 – 7.0.13; 6.4.0 – 6.4.16; 6.2.0 – 6.2.17 Fixed in — No fix listed CNA
  • FortiProxy VendorFortinet Affected 7.4.0; 7.2.0 – 7.2.6; 7.0.0 – 7.0.14; 2.0.0 – 2.0.14; 1.2.0 – 1.2.13 Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*6.2.0 to before 7.0.14; 7.2.0 to before 7.2.7VulnerableFortinet
cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:*7.4.0VulnerableFortinet
cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:*7.0.0 to before 7.0.3; 7.2.0 to before 7.2.3VulnerableFortinet
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*1.2.0 to before 7.0.15; 7.2.0 to before 7.2.8VulnerableFortinet
cpe:2.3:a:fortinet:fortiproxy:7.4.0:*:*:*:*:*:*:*7.4.0VulnerableFortinet
cpe:2.3:o:fortinet:fortipam:*:*:*:*:*:*:*:*1.0.0 to before 1.2.0VulnerableFortinet
  • cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 6.2.0 to before 7.0.14; 7.2.0 to before 7.2.7 Vulnerable ·Fortinet
  • cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:* Versions 7.4.0 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.3; 7.2.0 to before 7.2.3 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* Versions 1.2.0 to before 7.0.15; 7.2.0 to before 7.2.8 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiproxy:7.4.0:*:*:*:*:*:*:* Versions 7.4.0 Vulnerable ·Fortinet
  • cpe:2.3:o:fortinet:fortipam:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.2.0 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40721
  2. 2026-10-03 Alias added: GHSA-8hp7-6pv7-c4rv

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