How severe is CVE-2021-43205?

CVE-2021-43205 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-43205 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43205?

CVE-2021-43205 primarily affects Fortinet Forticlient. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-43205?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-43205 published?

CVE-2021-43205 was published on 2022-04-06 and last updated on 2026-06-17.

CVE-2021-43205

CVE-2021-43205 is a medium-severity vulnerability in Fortinet Forticlient with a CVSS 3.x base score of 4.3. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Fortinet Forticlient
Published: 2022-04-06
Last modified: 2026-06-17

Description

An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in FortiClient for Linux version 7.0.2 and below, 6.4.7 and below and 6.2.9 and below may allow an unauthenticated attacker to access the confighandler webserver via external binaries.

Frequently asked questions

What is CVE-2021-43205?: An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in FortiClient for Linux version 7.0.2 and below, 6.4.7 and below and 6.2.9 and below may allow an unauthenticated attacker to access the confighandler webserver via external binaries.
How severe is CVE-2021-43205?: CVE-2021-43205 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-43205 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43205?: CVE-2021-43205 primarily affects Fortinet Forticlient. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43205?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43205 published?: CVE-2021-43205 was published on 2022-04-06 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-21-226

Affected products (2)

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:linux:*:*
cpe:2.3:a:fortinet:forticlient:6.4.7:*:*:*:*:linux:*:*

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