CVE-2026-78221

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-2026-78043

The Windows Interactive Service in OpenVPN 2.7alpha1 through 2.7.6 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via specially crafted paths...

CVE-2026-84732

OpenVPN 2.x (through 2.6.22 and 2.7.6 ) is vulnerable to a denial of service in the control channel reliability layer, caused by a timeout integer overflow triggered by crafted ACK packet ID retransmissions. Attackers can either drive the reliable TLS retransmission timeout to grow without bound ...

CVE-2026-84256

An argument parsing issue in OpenVPN versions 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject. The CVSS 4.0 base score is 7.7 (HIGH) , with network attack vector, low complexity, pres...

CVE-2026-84226

OpenVPN versions 2.5.0 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows are vulnerable to a binary planting attack during network configuration steps, exploitable by local authenticated users with low privileges. The CVSS 4.0 score is 8.5 (HIGH) , with high impact to confidentiality, integr...

CVE-2026-82312

OpenVPN versions 2.0.0 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows are vulnerable to a denial of service caused by a NULL DACL on named IPC objects . Local authenticated users can exploit this to disrupt service. The CVSS 4.0 base score is 1.8 (LOW) , with a local attack vector requiri...

CVE-2026-81830

OpenVPN versions 2.4.0 through 2.6.22 contain a vulnerability in the Windows interactive service caused by incorrect file path validation , allowing local authenticated users to bypass the trusted configuration directory constraint. The impact is primarily a security bypass with high integrity im...

CVE-2026-81830

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...

CVE-2026-81738

OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver is vulnerable to an out-of-bounds write triggered by crafted DOMAIN-SEARCH entries. The CVSS 4.0 base score is 2.3 (LOW) , reflecting high attack complexity, a required attack condition, and only low impact to integrity, availab...

CVE-2026-78221

An incorrect buffer size calculation in the Windows Interactive Service component of OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information by supplying crafted NRPT inputs . The CVSS 4.0 base score is 5.9 (MEDIUM) with a loc...

CVE-2026-78043

OpenVPN's Windows Interactive Service in versions 2.7_alpha1 through 2.7.6 allows local authenticated users to bypass the trusted configuration directory constraint, enabling them to load arbitrary configuration files via specially crafted paths. The CVSS 4.0 base score is 5.6 (MEDIUM) with a loc...

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...

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...

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...

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. - Debian Linux - openvpn - None Ubuntu Linux - Unknown description CVE-2026-84471 Note that Nessus relies on the presence of the package as reported by the vendor...

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...

CVE-2026-74750

In the Linux kernel, the following vulnerability has been resolved: ovpn: defer key slot crypto freeing to workqueue Key slots are released through a kref and the existing release path frees the AEAD transforms from an RCU callback. That is not safe for all crypto implementations: cryptofreeaead...

Astra Linux – Vulnerability in OpenVPN

Before version 2.6.11, OpenVPN did not properly sanitize PUSHREPLY messages. This vulnerability could be exploited by attackers who control the server, allowing them to inject unexpected arbitrary data into client logs...

Astra Linux – Vulnerability in OpenVPN

A vulnerability was discovered in OpenVPN 2.4.x prior to version 2.4.9. An attacker can inject a data channel v2 PDATAV2 packet using the victim’s peer-id. Normally, such packets are discarded. However, if this packet arrives before the data channel crypto parameters have been initialized, the...