Vulnerability Details CVE-2026-111225
Netgate pfSense CE 2.5.0 through 2.9.0 contains an OS command injection vulnerability in openvpn.learn-address.sh that allows authenticated VPN clients to execute commands as the unbound user. Attackers can embed shell metacharacters in the certificate common name or username, which is interpolated unquoted into su -c strings, when DNS Resolver client registration is enabled.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.027
EPSS Ranking 85.6%
CVSS Severity
CVSS v3 Score 5.0
References
- https://abraxaslabs.tech/research/pfsense-ce-leftovers
- https://github.com/abraxas/pfsense-ovpn-learn-cn
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/sbin/openvpn.learn-address.sh#L57-L62
- https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.5.0-through-2.9.0-os-command-injection-via-openvpn-learn-address-sh