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…

published 2022-04-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9283

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

fortinet forticlient 6.2.9, 6.4.3

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-10-23)

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:X/RC:X
CNA	3.1	7.1	CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	8.0	CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	7.9	AV:A/AC:M/Au:N/C:C/I:C/A:C

Affected products

Fortinet Fortinet FortiClientLinux

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

Technology feeds

Fortinet rss critical rss

References

fortiguard.com /advisory/FG-IR-20-241
vendor-advisory

Sources

CVE List CVE-2021-22127
NVD CVE-2021-22127

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary