How severe is CVE-2022-39953?

CVE-2022-39953 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-39953 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-39953?

CVE-2022-39953 primarily affects Fortinet Fortinac. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-39953?

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-2022-39953 published?

CVE-2022-39953 was published on 2023-03-07 and last updated on 2026-06-17.

CVE-2022-39953

CVE-2022-39953 is a high-severity vulnerability in Fortinet Fortinac with a CVSS 3.x base score of 7.8. 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-269.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Fortinet Fortinac
Published: 2023-03-07
Last modified: 2026-06-17

Description

A improper privilege management in Fortinet FortiNAC version 9.4.0 through 9.4.1, FortiNAC version 9.2.0 through 9.2.6, FortiNAC version 9.1.0 through 9.1.8, FortiNAC all versions 8.8, FortiNAC all versions 8.7, FortiNAC all versions 8.6, FortiNAC all versions 8.5, FortiNAC version 8.3.7 allows attacker to escalation of privilege via specially crafted commands.

Frequently asked questions

What is CVE-2022-39953?: A improper privilege management in Fortinet FortiNAC version 9.4.0 through 9.4.1, FortiNAC version 9.2.0 through 9.2.6, FortiNAC version 9.1.0 through 9.1.8, FortiNAC all versions 8.8, FortiNAC all versions 8.7, FortiNAC all versions 8.6, FortiNAC all versions 8.5, FortiNAC version 8.3.7 allows attacker to escalation of privilege via specially crafted commands.
How severe is CVE-2022-39953?: CVE-2022-39953 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-39953 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-39953?: CVE-2022-39953 primarily affects Fortinet Fortinac. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-39953?: 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-2022-39953 published?: CVE-2022-39953 was published on 2023-03-07 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-22-309

Affected products (4)

cpe:2.3:a:fortinet:fortinac:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:8.3.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:9.4.1:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortinac

CVE-2023-33299 — Critical (CVSS 9.8): A deserialization of untrusted data in Fortinet FortiNAC below 7.2.1, below 9.4.3, below 9.2.8 and all earlier versions…
CVE-2022-39952 — Critical (CVSS 9.8): A external control of file name or path in Fortinet FortiNAC versions 9.4.0, 9.2.0 through 9.2.5, 9.1.0 through 9.1.7,…
CVE-2022-38375 — Critical (CVSS 9.1): An improper authorization vulnerability [CWE-285] in Fortinet FortiNAC version 9.4.0 through 9.4.1 and before 9.2.6…
CVE-2022-26117 — High (CVSS 8.8): An empty password in configuration file vulnerability [CWE-258] in FortiNAC version 8.3.7 and below, 8.5.2 and below,…
CVE-2021-43065 — High (CVSS 7.8): A incorrect permission assignment for critical resource in Fortinet FortiNAC version 9.2.0, version 9.1.3 and below,…
CVE-2021-41021 — High (CVSS 7.8): A privilege escalation vulnerability in FortiNAC versions 8.8.8 and below and 9.1.2 and below may allow an admin user…

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