Total
42 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2026-13122 | 1 Openvpn | 1 Openvpn | 2026-07-09 | N/A | 5.3 MEDIUM |
| OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled | |||||
| CVE-2026-13698 | 1 Openvpn | 1 Openvpn | 2026-07-09 | N/A | 7.5 HIGH |
| A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service | |||||
| CVE-2023-46850 | 3 Debian, Fedoraproject, Openvpn | 4 Debian Linux, Fedora, Openvpn and 1 more | 2026-06-23 | N/A | 9.8 CRITICAL |
| Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer. | |||||
| CVE-2025-2704 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 7.5 HIGH |
| OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of service by corrupting and replaying network packets in the early handshake phase | |||||
| CVE-2025-13751 | 2 Microsoft, Openvpn | 2 Windows, Openvpn | 2026-06-17 | N/A | 5.5 MEDIUM |
| Interactive service agent in OpenVPN version 2.5.0 through 2.6.16 and 2.7_alpha1 through 2.7_rc2 on Windows allows a local authenticated user to connect to the service and trigger an error causing a local denial of service. | |||||
| CVE-2025-13086 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 7.5 HIGH |
| Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client | |||||
| CVE-2025-12106 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 9.1 CRITICAL |
| Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses | |||||
| CVE-2024-5594 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 9.1 CRITICAL |
| OpenVPN before 2.6.11 does not santize PUSH_REPLY messages properly which an attacker controlling the server can use to inject unexpected arbitrary data ending up in client logs. | |||||
| CVE-2024-4877 | 2 Microsoft, Openvpn | 2 Windows, Openvpn | 2026-06-17 | N/A | 8.8 HIGH |
| OpenVPN version 2.4.0 through 2.6.10 on Windows allows an external, lesser privileged process to create a named pipe which the OpenVPN GUI component would connect to allowing it to escalate its privileges | |||||
| CVE-2024-28882 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 4.3 MEDIUM |
| OpenVPN from 2.6.0 through 2.6.10 in a server role accepts multiple exit notifications from authenticated clients which will extend the validity of a closing session | |||||
| CVE-2024-27903 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 9.8 CRITICAL |
| OpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker to load an arbitrary plug-in which can be used to interact with the privileged OpenVPN interactive service. | |||||
| CVE-2024-27459 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 7.8 HIGH |
| The interactive service in OpenVPN 2.6.9 and earlier allows an attacker to send data causing a stack overflow which can be used to execute arbitrary code with more privileges. | |||||
| CVE-2024-24974 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 7.5 HIGH |
| The interactive service in OpenVPN 2.6.9 and earlier allows the OpenVPN service pipe to be accessed remotely, which allows a remote attacker to interact with the privileged OpenVPN interactive service. | |||||
| CVE-2023-46849 | 3 Debian, Fedoraproject, Openvpn | 4 Debian Linux, Fedora, Openvpn and 1 more | 2026-06-17 | N/A | 7.5 HIGH |
| Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service. | |||||
| CVE-2022-0547 | 3 Debian, Fedoraproject, Openvpn | 3 Debian Linux, Fedora, Openvpn | 2026-06-17 | 7.5 HIGH | 9.8 CRITICAL |
| OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials. | |||||
| CVE-2021-3606 | 2 Microsoft, Openvpn | 2 Windows, Openvpn | 2026-06-17 | 4.4 MEDIUM | 7.8 HIGH |
| OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe). | |||||
| CVE-2021-3547 | 1 Openvpn | 1 Openvpn | 2026-06-17 | 5.8 MEDIUM | 7.4 HIGH |
| OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration. | |||||
| CVE-2020-20813 | 1 Openvpn | 1 Openvpn | 2026-06-17 | N/A | 7.5 HIGH |
| Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet. | |||||
| CVE-2020-15078 | 4 Canonical, Debian, Fedoraproject and 1 more | 4 Ubuntu Linux, Debian Linux, Fedora and 1 more | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks. | |||||
| CVE-2020-11810 | 3 Debian, Fedoraproject, Openvpn | 3 Debian Linux, Fedora, Openvpn | 2026-06-17 | 4.3 MEDIUM | 3.7 LOW |
| An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (P_DATA_V2) packet using a victim's peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim's connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use. | |||||