Is CVE-2005-2531 in the CISA KEV catalog?

No. CVE-2005-2531 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2005-2531?

CVE-2005-2531 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2005-2531?

CVE-2005-2531 has an EPSS score of 1.97% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2005-2531?

Upgrade openvpn on debian 11 to 2.0.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2005-2531

MEDIUMEPSS 78th pctl

5.0

CVSS v2

NVD

Description

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial of service (client disconnection) via a large number of failed authentication attempts.

How to fix

Remediation Available

openvpnDebian

Fixed in:2.0.2-1CVE-2005-2531

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.97%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Patch1

mandriva.com

Other references6

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.