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8.8

CVE-2025-10680: OpenVPN: Remote Code Injection via DNS on POSIX Platforms

CVE-2025-10680 · published 1 year ago
Summary

OpenVPN's DNS functionality on POSIX systems allows a malicious server to inject and execute shell commands on a client's system when using the --dns-updown option. This could allow an attacker to gain unauthorized access to the client's system. Update to a fixed version of OpenVPN to mitigate this risk.

Original advisory text
OpenVPN 2.7_alpha1 through 2.7_beta1 on POSIX based platforms allows a remote authenticated server to inject shell commands via DNS variables when --dns-updown is in use
OpenVPN 2.7_alpha1 through 2.7_beta1 on POSIX based platforms allows a remote authenticated server to inject shell commands via DNS variables when --dns-updown is in use
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
8.8 High
Exploitation
8% chance of attack within 30 days
Type
CWE-78OS Command Injection
Timeline
Published24 Oct 2025
Updated3 Nov 2026
First seen7 Mar 2026
Sources
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