How severe is CVE-2023-43976?

CVE-2023-43976 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-43976 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-2023-43976?

CVE-2023-43976 affects Catonetworks Cato Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43976?

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-2023-43976 published?

CVE-2023-43976 was published on 2023-10-03 and last updated on 2026-06-17.

CVE-2023-43976

CVE-2023-43976 is a high-severity vulnerability in Catonetworks Cato Client with a CVSS 3.x base score of 8.1. 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-367.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-367
Affected product: Catonetworks Cato Client
Published: 2023-10-03
Last modified: 2026-06-17

Description

An issue in CatoNetworks CatoClient before v.5.4.0 allows attackers to escalate privileges and winning the race condition (TOCTOU) via the PrivilegedHelperTool component.

Frequently asked questions

What is CVE-2023-43976?: An issue in CatoNetworks CatoClient before v.5.4.0 allows attackers to escalate privileges and winning the race condition (TOCTOU) via the PrivilegedHelperTool component.
How severe is CVE-2023-43976?: CVE-2023-43976 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-43976 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-2023-43976?: CVE-2023-43976 affects Catonetworks Cato Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43976?: 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-2023-43976 published?: CVE-2023-43976 was published on 2023-10-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:catonetworks:cato_client:*:*:*:*:*:macos:*:*

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