PT-2026-86644

OpenVPN 2.0.0 through 2.6.22 and 2.7 alpha1 through 2.7.6 on Windows allows local authenticated users to cause a denial of service via a NULL DACL on named IPC objects...

CVE-2026-81738: Stack-based Buffer Overflow

OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries...

CVE-2026-84256: Improper Neutralization of Special Elements used in an OS Command

An argument parsing issue in OpenVPN 2.1rc10 through 2.6.22 and 2.7alpha1 through 2.7.7 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject...

CVE-2026-78221: Incorrect Calculation of Buffer Size

An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs...

CVE-2026-84226: Untrusted Search Path

OpenVPN version 2.5.0 through 2.6.22 and 2.7alpha1 through 2.7.6 on Windows allows local authenticated users to perform a binary planting attack during network configuration steps...

CVE-2026-84732: Integer Overflow or Wraparound

Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow...

CVE-2026-81830: External Control of File Name or Path

The Windows interactive service in OpenVPN 2.4.0 through 2.6.22 allows local authenticated users to bypass the trusted configuration directory constraint via incorrect file path validation...

PT-2026-86640

An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7 alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs...

PT-2026-86680

A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver version 2.5.0 through 2.8.6 allows local authenticated users to cause a system crash via crafted control messages...

CVE-2026-82312: Incorrect Permission Assignment for Critical Resource

OpenVPN 2.0.0 through 2.6.22 and 2.7alpha1 through 2.7.6 on Windows allows local authenticated users to cause a denial of service via a NULL DACL on named IPC objects...

CVE-2026-82325: Use After Free

A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver version 2.5.0 through 2.8.6 allows local authenticated users to cause a system crash via crafted control messages...

PT-2026-86645

OpenVPN version 2.5.0 through 2.6.22 and 2.7 alpha1 through 2.7.6 on Windows allows local authenticated users to perform a binary planting attack during network configuration steps...

PT-2026-86642

OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries...

openvpn v2.7.7

OpenVPN -- A Secure tunneling daemon Copyright C 2002-2026 OpenVPN Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. To get the latest release of OpenVPN, go to:...

FreeBSD : OpenVPN: denial of service (25012057-a886-11f1-a836-b42e991fc52e)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 25012057-a886-11f1-a836-b42e991fc52e advisory. OpenVPN team reports: OpenVPN 2.x allows attackers to potentially cause a denial of service against the...

Linux Distros Unpatched Vulnerability : CVE-2026-84732

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that...

PT-2026-86657

Name of the Vulnerable Software and Affected Versions OpenVPN versions 2.6.0 through 2.6.22 OpenVPN versions 2.7.0 through 2.7.6 Description Remote unauthenticated attackers can cause a denial of service by sending crafted inputs that trigger a timeout integer overflow during the retransmission o...

Linux Distros Unpatched Vulnerability : CVE-2026-84471

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7alpha1 through 2.7.7 allows remote authenticated peers to...

OpenVPN: denial of service

OpenVPN team reports: OpenVPN 2.x allows attackers to potentially cause a denial of service against the control channel reliability layer, either by driving the reliable TLS retransmission timeout to grow without bound, or by sending acknowledgements for packets that cannot be outstanding...

CVE-2026-80519

In the Linux kernel, the following vulnerability has been resolved: ovpn: finish crypto callback cleanup before peer release Crypto completion callbacks hold both key-slot and peer references. The peer reference pins the netdev, and dropping the last peer reference can let netdev unregistration a...