OpenVPN fixes 1 vulnerability

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[TLP:CLEAR] OpenVPN fixes 1 vulnerability

OpenVPN versions 2.6.14-I002 and 2.7_alpha2-I001 fix 1 vulnerability in the ovpn-dco-win component of OpenVPN GUI for Windows [1].

OpenVPN ovpn-dco-win - DoS (CVE-2025-50054)

CVSS 5.5 (Medium)

An authenticated local attacker can send an oversized message, even through an unprivileged process, and perform a DoS attack due to a flaw in the DCO driver (ovpn-dco-win) [1][2].

The vulnerability is present in products:

ovpn-dco-win; <=1.3.0; >=1.3.0, <=2.5.8;
OpenVPN GUI (Windows); >=2.6.0-I005, <=2.6.14-I001; ==2.7_alpha1-I001;

CVSS: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

More information:

CVE-2025-50054 at cve.org, NVD
CWE-122: Heap-based Buffer Overflow at cwe.mitre.org

The vulnerability was publicly disclosed 20. 6. 2025.

Links

By CESNET, z.s.p.o. Michaela Ručková on 24. 6. 2025.

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[TLP:CLEAR] OpenVPN fixes 1 vulnerability

OpenVPN ovpn-dco-win - DoS (CVE-2025-50054)

CVSS 5.5 (Medium)

Links