Vulnerability Details CVE-2026-11604
An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 26.1%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-11604
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cpe:2.3:a:openvpn:ovpn-dco-win:2.4.0
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.0
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.1
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.2
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.3
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.4
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.5
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cpe:2.3:a:openvpn:ovpn-dco-win:2.5.6