TI-2021-05120 Aliases CVE-2021-22130 GHSA-r6h6-26c6-pwfv

Out-of-bounds write in Fortinet FortiProxy

LOW 34CWE-787Published 2021-06-03 · Updated 2024-10-25

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-787 and the CVSS impact.

Summary

A stack-based buffer overflow vulnerability in FortiProxy physical appliance CLI 2.0.0 to 2.0.1, 1.2.0 to 1.2.9, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 may allow an authenticated, remote attacker to perform a Denial of Service attack by running the `diagnose sys cpuset` with a large cpuset mask value. Fortinet is not aware of any successful exploitation of this vulnerability that would lead to code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01107 66th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Fortinet	Fortinet FortiProxy	FortiProxy 2.0.0 to 2.0.1, 1.2.0 to 1.2.9, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7	—	No fix listed	CNA

Fortinet FortiProxy VendorFortinet Affected FortiProxy 2.0.0 to 2.0.1, 1.2.0 to 1.2.9, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:fortinet:fortiproxy::::::::	1.0.0 – 1.0.7; 1.1.0 – 1.1.6; 1.2.0 to before 1.2.10; 2.0.0 to before 2.0.2	Vulnerable	Fortinet

cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* Versions 1.0.0 – 1.0.7; 1.1.0 – 1.1.6; 1.2.0 to before 1.2.10; 2.0.0 to before 2.0.2 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-22130
2026-10-03 Alias added: GHSA-r6h6-26c6-pwfv

References

Advisory 1

https://fortiguard.com/advisory/FG-IR-21-006

TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
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
TI-2022-20674 Out-of-bounds write in Fortinet FortiProxy KEVCVSS 3.1CRITICAL 9.8

See all 124 →

Sources

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