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TI-2021-05118 Aliases CVE-2021-22128GHSA-mm5g-p9fc-43hm

An improper access control vulnerability in FortiProxy SSL VPN portal 2.0.0, 1.2.9 and…

Priority LOW 33Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

An improper access control vulnerability in FortiProxy SSL VPN portal 2.0.0, 1.2.9 and below versions may allow an authenticated, remote attacker to access internal service such as the ZebOS Shell on the FortiProxy appliance through the Quick Connection functionality.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01036 64th 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
FortinetFortinet FortiProxyFortiProxy 2.0.0, 1.2.9 and below—No fix listedCNA
  • Fortinet FortiProxy VendorFortinet Affected FortiProxy 2.0.0, 1.2.9 and below Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*up to 1.2.9VulnerableFortinet
cpe:2.3:a:fortinet:fortiproxy:2.0.0:*:*:*:*:*:*:*2.0.0VulnerableFortinet
  • cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* Versions up to 1.2.9 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiproxy:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22128
  2. 2026-10-03 Alias added: GHSA-mm5g-p9fc-43hm

References

Advisory 1

  • 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