TI-2021-05117 Aliases CVE-2021-22127 GHSA-x68v-pfcv-26fm

OS command injection in Fortinet FortiClientLinux

LOW 37CWE-78Published 2022-04-06 · Updated 2024-10-25

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.

Summary

An improper input validation vulnerability in FortiClient for Linux 6.4.x before 6.4.3, FortiClient for Linux 6.2.x before 6.2.9 may allow an unauthenticated attacker to execute arbitrary code on the host operating system as root via tricking the user into connecting to a network with a malicious name.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00507 43rd 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 FortiClientLinux	FortiClientLinux 6.4.2 and below, FortiClientLinux 6.2.8 and below	—	No fix listed	CNA

Fortinet FortiClientLinux VendorFortinet Affected FortiClientLinux 6.4.2 and below, FortiClientLinux 6.2.8 and below Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:fortinet:forticlient::::::linux::*	before 6.2.9; 6.4.0 to before 6.4.3	Vulnerable	Fortinet

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:linux:*:* Versions before 6.2.9; 6.4.0 to before 6.4.3 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-22127
2026-10-03 Alias added: GHSA-x68v-pfcv-26fm

References

Advisory 1

https://fortiguard.com/advisory/FG-IR-20-241

TI-2019-13180 An unquoted service path vulnerability in the FortiClient FortiTray component of… CVSS 3.1CRITICAL 9.8
TI-2023-24393 Code injection in Fortinet FortiClientLinux CVSS 3.1CRITICAL 9.4
TI-2017-10335 Information disclosure in Fortinet FortiClient for Windows CVSS 3.0HIGH 8.8
TI-2016-06998 In FortiClientWindows 5.4.1 and 5.4.2, an attacker may escalate privilege via a FortiClientNamedPipe vulnerability. CVSS 3.0HIGH 8.8
TI-2019-03954 Untrusted search path in Fortinet FortiClientWindows CVSS 3.1HIGH 8.6
TI-2017-05007 A privilege escalation in Fortinet FortiClient Windows 5.4.3 and earlier as well as 5.6.0… CVSS 3.0HIGH 8.1

See all 85 →

Sources

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