CVE-2005-2534

CVE-2005-2534 is a low-severity vulnerability in Openvpn with a CVSS 2.0 base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.

Frequently asked questions

What is CVE-2005-2534?
Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.
How severe is CVE-2005-2534?
CVE-2005-2534 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2005-2534 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-2534?
CVE-2005-2534 primarily affects Openvpn. In total, 74 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-2534?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-2534 published?
CVE-2005-2534 was published on 2005-08-24 and last updated on 2026-06-16.

References

Affected products (74)

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