OpenVPN
by OpenVPN
Source repositories
CVEs (59)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2026-13122 | Med | 0.27 | 5.3 | 0.00 | Jul 6, 2026 | 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-2025-15497 | Low | 0.25 | — | 0.00 | Jan 30, 2026 | Insufficient epoch key slot processing in OpenVPN 2.7_alpha1 through 2.7_rc5 allows remote authenticated users to trigger an assert resulting in a denial of service | ||
| CVE-2024-5198 | Low | 0.21 | 3.3 | 0.00 | Jan 15, 2025 | OpenVPN ovpn-dco for Windows version 1.1.1 allows an unprivileged local attacker to send I/O control messages with invalid data to the driver resulting in a NULL pointer dereference leading to a system halt. | ||
| CVE-2026-63649 | Med | 0.20 | — | — | Aug 14, 2026 | The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks | ||
| CVE-2026-63650 | Low | 0.06 | — | — | Aug 14, 2026 | OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote authenticated users to be misidentified by ignoring the configured X.509 username identity lookup field | ||
| CVE-2020-11810 | Low | 0.00 | 3.7 | 0.02 | Apr 27, 2020 | 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… | ||
| CVE-2018-9336 | Hig | 0.00 | 7.8 | 0.01 | May 1, 2018 | openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have… | ||
| CVE-2014-8104 | 0.00 | — | 0.03 | Dec 3, 2014 | OpenVPN 2.x before 2.0.11, 2.1.x, 2.2.x before 2.2.3, and 2.3.x before 2.3.6 allows remote authenticated users to cause a denial of service (server crash) via a small control channel packet. | |||
| CVE-2014-9104 | 0.00 | — | 0.01 | Nov 26, 2014 | Multiple cross-site request forgery (CSRF) vulnerabilities in the XML-RPC API in the Desktop Client in OpenVPN Access Server 1.5.6 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) disconnecting established VPN sessions, (2)… | |||
| CVE-2013-2061 | 0.00 | — | 0.03 | Nov 18, 2013 | The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on… | |||
| CVE-2008-3459 | 0.00 | — | 0.02 | Aug 4, 2008 | Unspecified vulnerability in OpenVPN 2.1-beta14 through 2.1-rc8, when running on non-Windows systems, allows remote servers to execute arbitrary commands via crafted (1) lladdr and (2) iproute configuration directives, probably related to shell metacharacters. | |||
| CVE-2006-2229 | 0.00 | — | 0.01 | May 5, 2006 | OpenVPN 2.0.7 and earlier, when configured to use the --management option with an IP that is not 127.0.0.1, uses a cleartext password for TCP sessions to the management interface, which might allow remote attackers to view sensitive information or cause a denial of service. | |||
| CVE-2006-1629 | 0.00 | — | 0.03 | Apr 6, 2006 | OpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on the client by using setenv with the LD_PRELOAD environment variable. | |||
| CVE-2005-3409 | 0.00 | — | 0.03 | Nov 2, 2005 | OpenVPN 2.x before 2.0.4, when running in TCP mode, allows remote attackers to cause a denial of service (segmentation fault) by forcing the accept function call to return an error status, which leads to a null dereference in an exception handler. | |||
| CVE-2005-3393 | 0.00 | — | 0.03 | Nov 1, 2005 | Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x allows remote clients to execute arbitrary code via format string specifiers in a push of the dhcp-option command option. | |||
| CVE-2005-2533 | 0.00 | — | 0.01 | Aug 24, 2005 | OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses. | |||
| CVE-2005-2531 | 0.00 | — | 0.02 | Aug 24, 2005 | OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers… | |||
| CVE-2005-2532 | 0.00 | — | 0.03 | Aug 24, 2005 | OpenVPN before 2.0.1 does not properly flush the OpenSSL error queue when a packet can not be decrypted by the server, which allows remote authenticated attackers to cause a denial of service (client disconnection) via a large number of packets that can not be decrypted. | |||
| CVE-2005-2534 | 0.00 | — | 0.01 | Aug 24, 2005 | Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate. |
- risk 0.27cvss 5.3epss 0.00
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
- risk 0.25cvss —epss 0.00
Insufficient epoch key slot processing in OpenVPN 2.7_alpha1 through 2.7_rc5 allows remote authenticated users to trigger an assert resulting in a denial of service
- risk 0.21cvss 3.3epss 0.00
OpenVPN ovpn-dco for Windows version 1.1.1 allows an unprivileged local attacker to send I/O control messages with invalid data to the driver resulting in a NULL pointer dereference leading to a system halt.
- risk 0.20cvss —epss —
The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks
- risk 0.06cvss —epss —
OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote authenticated users to be misidentified by ignoring the configured X.509 username identity lookup field
- risk 0.00cvss 3.7epss 0.02
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…
- risk 0.00cvss 7.8epss 0.01
openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have…
- CVE-2014-8104Dec 3, 2014risk 0.00cvss —epss 0.03
OpenVPN 2.x before 2.0.11, 2.1.x, 2.2.x before 2.2.3, and 2.3.x before 2.3.6 allows remote authenticated users to cause a denial of service (server crash) via a small control channel packet.
- CVE-2014-9104Nov 26, 2014risk 0.00cvss —epss 0.01
Multiple cross-site request forgery (CSRF) vulnerabilities in the XML-RPC API in the Desktop Client in OpenVPN Access Server 1.5.6 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) disconnecting established VPN sessions, (2)…
- CVE-2013-2061Nov 18, 2013risk 0.00cvss —epss 0.03
The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on…
- CVE-2008-3459Aug 4, 2008risk 0.00cvss —epss 0.02
Unspecified vulnerability in OpenVPN 2.1-beta14 through 2.1-rc8, when running on non-Windows systems, allows remote servers to execute arbitrary commands via crafted (1) lladdr and (2) iproute configuration directives, probably related to shell metacharacters.
- CVE-2006-2229May 5, 2006risk 0.00cvss —epss 0.01
OpenVPN 2.0.7 and earlier, when configured to use the --management option with an IP that is not 127.0.0.1, uses a cleartext password for TCP sessions to the management interface, which might allow remote attackers to view sensitive information or cause a denial of service.
- CVE-2006-1629Apr 6, 2006risk 0.00cvss —epss 0.03
OpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on the client by using setenv with the LD_PRELOAD environment variable.
- CVE-2005-3409Nov 2, 2005risk 0.00cvss —epss 0.03
OpenVPN 2.x before 2.0.4, when running in TCP mode, allows remote attackers to cause a denial of service (segmentation fault) by forcing the accept function call to return an error status, which leads to a null dereference in an exception handler.
- CVE-2005-3393Nov 1, 2005risk 0.00cvss —epss 0.03
Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x allows remote clients to execute arbitrary code via format string specifiers in a push of the dhcp-option command option.
- CVE-2005-2533Aug 24, 2005risk 0.00cvss —epss 0.01
OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses.
- CVE-2005-2531Aug 24, 2005risk 0.00cvss —epss 0.02
OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers…
- CVE-2005-2532Aug 24, 2005risk 0.00cvss —epss 0.03
OpenVPN before 2.0.1 does not properly flush the OpenSSL error queue when a packet can not be decrypted by the server, which allows remote authenticated attackers to cause a denial of service (client disconnection) via a large number of packets that can not be decrypted.
- CVE-2005-2534Aug 24, 2005risk 0.00cvss —epss 0.01
Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.
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