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The 15 most recently published vulnerabilities affecting openvpn.

• CVE-2026-82325A 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 messagesSep 7, 2026
• CVE-2026-84732Retransmissions 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 overflowSep 7, 2026
• CVE-2026-84256An argument parsing issue in OpenVPN 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 subjectSep 7, 2026
• CVE-2026-84226OpenVPN 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 stepsSep 7, 2026
• CVE-2026-82312OpenVPN 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 objectsSep 7, 2026
• CVE-2026-81830The 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 validationSep 7, 2026
• CVE-2026-81738OpenVPN 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 entriesSep 7, 2026
• CVE-2026-78221An 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 informa...Sep 7, 2026
• CVE-2026-78043The Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files ...Sep 7, 2026
• CVE-2026-63650OpenVPN 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 fieldAug 14, 2026
• CVE-2026-63649The 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 arbit...Aug 14, 2026
• CVE-2026-12932A memory leak in the tls-crypt-v2 client key extraction in OpenVPN 2.5.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service (memory exhaustion) via a f...8.1Jul 30, 2026
• CVE-2026-12996A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TL...8.1Jul 30, 2026
• CVE-2026-11771OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM re...7.5Jul 30, 2026
• CVE-2026-13117An incomplete guard in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to trigger a use-after-free during TLS session promotion, potentially leading to a...8.1Jul 30, 2026