OpenVPN Vulnerability Allows User Impersonation via Crafted Certificate
CVE-2026-84790

7.6HIGH

Key Information:

Vendor

Openvpn
Status
Openvpn
Vendor
CVE Published:
13 October 2026

What is CVE-2026-84790?

A vulnerability exists in OpenVPN versions 2.7_alpha1 to 2.7.7 that allows remote authenticated users to impersonate other users. This security flaw is due to the improper handling of the crafted certificate's subject field, enabling an attacker to impersonate other users without their knowledge. Users should be aware of this issue and apply any recommended updates or patches from OpenVPN to mitigate potential risks.

Affected Version(s)

OpenVPN 2.7_alpha1 <= 2.7.7

References

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

CVSS V4

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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