How severe is CVE-2021-22127?

CVE-2021-22127 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22127 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22127?

CVE-2021-22127 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22127?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22127 published?

CVE-2021-22127 was published on 2022-04-06 and last updated on 2026-06-17.

CVE-2021-22127

CVE-2021-22127 is a high-severity vulnerability in Fortinet Forticlient with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 7.9
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Fortinet Forticlient
Published: 2022-04-06
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-22127?: 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.
How severe is CVE-2021-22127?: CVE-2021-22127 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22127 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22127?: CVE-2021-22127 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22127?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22127 published?: CVE-2021-22127 was published on 2022-04-06 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:linux:*:*

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