CVE-2026-84732

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 of ACK packet IDs. This issue resides in the reliability layer, which is the component responsible for managing TLS handshakes and acknowledgment packets.

Recommendations Update OpenVPN versions 2.6.0 through 2.6.22 to version 2.6.23 or newer. Update OpenVPN versions 2.7.0 through 2.7.6 to version 2.7.7.