Denial of Service Vulnerability in OpenVPN by OpenVPN Technologies
CVE-2026-84732

8.7HIGH

Key Information:

Vendor

Openvpn
Status
Openvpn
Vendor
CVE Published:
7 September 2026

What is CVE-2026-84732?

A vulnerability in OpenVPN allows remote unauthenticated attackers to exploit ACK packet retransmissions through specific versions, causing a denial of service. This occurs when crafted inputs lead to a timeout integer overflow, potentially disrupting service availability and impacting users relying on secure connections.

Affected Version(s)

OpenVPN 0 <= 2.6.22

OpenVPN 0 <= 2.7.6

References

https://community.openvpn.net/Security%20Announcements/CV...
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.