How severe is CVE-2023-22633?

CVE-2023-22633 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-22633 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22633?

CVE-2023-22633 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-2023-22633?

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-2023-22633 published?

CVE-2023-22633 was published on 2023-06-13 and last updated on 2026-06-17.

CVE-2023-22633

CVE-2023-22633 is a high-severity vulnerability in Fortinet Fortinac with a CVSS 3.x base score of 7.5. 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-264.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Fortinet Fortinac
Published: 2023-06-13
Last modified: 2026-06-17

Description

An improper permissions, privileges, and access controls vulnerability [CWE-264] in FortiNAC-F 7.2.0, FortiNAC 9.4.1 and below, 9.2.6 and below, 9.1.8 and below, 8.8.0 all versions 8.7.0 all versions may allow an unauthenticated attacker to perform a DoS attack on the device via client-secure renegotiation.

Frequently asked questions

What is CVE-2023-22633?: An improper permissions, privileges, and access controls vulnerability [CWE-264] in FortiNAC-F 7.2.0, FortiNAC 9.4.1 and below, 9.2.6 and below, 9.1.8 and below, 8.8.0 all versions 8.7.0 all versions may allow an unauthenticated attacker to perform a DoS attack on the device via client-secure renegotiation.
How severe is CVE-2023-22633?: CVE-2023-22633 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-22633 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22633?: CVE-2023-22633 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-2023-22633?: 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-2023-22633 published?: CVE-2023-22633 was published on 2023-06-13 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-22-521

Affected products (4)

cpe:2.3:a:fortinet:fortinac:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac:9.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortinac-f:7.2.0:*:*:*:*:*:*:*

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-2022-39953 — High (CVSS 7.8): A improper privilege management in Fortinet FortiNAC version 9.4.0 through 9.4.1, FortiNAC version 9.2.0 through 9.2.6,…
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,…

All CVEs affecting Fortinet Fortinac →

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CVE-2016-7457 — Critical (CVSS 10.0): VMware vRealize Operations (aka vROps) 6.x before 6.4.0 allows remote authenticated users to gain privileges, or halt…
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