How severe is CVE-2023-5594?

CVE-2023-5594 has a CVSS 3.x base score of 7.5, 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 low, and availability none.

Is CVE-2023-5594 being actively exploited?

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

What products are affected by CVE-2023-5594?

CVE-2023-5594 primarily affects Eset Endpoint Antivirus. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-5594?

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-2023-5594 published?

CVE-2023-5594 was published on 2023-12-21 and last updated on 2026-06-17.

CVE-2023-5594

CVE-2023-5594 is a high-severity vulnerability in Eset Endpoint Antivirus 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-295.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Eset Endpoint Antivirus
Published: 2023-12-21
Last modified: 2026-06-17

Description

Improper validation of the server’s certificate chain in secure traffic scanning feature considered intermediate certificate signed using the MD5 or SHA1 algorithm as trusted.

Frequently asked questions

What is CVE-2023-5594?: Improper validation of the server’s certificate chain in secure traffic scanning feature considered intermediate certificate signed using the MD5 or SHA1 algorithm as trusted.
How severe is CVE-2023-5594?: CVE-2023-5594 has a CVSS 3.x base score of 7.5, 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 low, and availability none.
Is CVE-2023-5594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5594?: CVE-2023-5594 primarily affects Eset Endpoint Antivirus. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-5594?: 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-2023-5594 published?: CVE-2023-5594 was published on 2023-12-21 and last updated on 2026-06-17.

References

https://support.eset.com/en/ca8562-eset-customer-advisory-improper-following-of-a-certificates-chain-of-trust-in-eset-security-products-fixed

Affected products (13)

cpe:2.3:a:eset:endpoint_antivirus:*:*:*:*:*:linux:*:*
cpe:2.3:a:eset:endpoint_antivirus:-:*:*:*:*:windows:*:*
cpe:2.3:a:eset:endpoint_security:-:*:*:*:*:windows:*:*
cpe:2.3:a:eset:file_security:-:*:*:*:*:azure:*:*
cpe:2.3:a:eset:internet_security:-:*:*:*:*:*:*:*
cpe:2.3:a:eset:mail_security:-:*:*:*:*:domino:*:*
cpe:2.3:a:eset:mail_security:-:*:*:*:*:exchange_server:*:*
cpe:2.3:a:eset:nod32_antivirus:-:*:*:*:*:*:*:*
cpe:2.3:a:eset:security:-:*:*:*:*:sharepoint_server:*:*
cpe:2.3:a:eset:security:-:*:*:*:ultimate:*:*:*
cpe:2.3:a:eset:server_security:*:*:*:*:*:linux:*:*
cpe:2.3:a:eset:server_security:-:*:*:*:*:windows_server:*:*
cpe:2.3:a:eset:smart_security:-:*:*:*:premium:*:*:*

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