CVE-2026-111225
Netgate pfSense CE 2.5.0 through 2.9.0 OS Command Injection via openvpn.learn-address.sh
CVSS Score
5.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-78 |
| Vendor | netgate |
| Product | pfsense ce |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
Netgate / pfSense CE
2.5.0 ≤ 2.9.0
References
github.com: https://github.com/abraxas/pfsense-ovpn-learn-cn abraxaslabs.tech: https://abraxaslabs.tech/research/pfsense-ce-leftovers github.com: https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/sbin/openvpn.learn-address.sh#L57-L62 vulncheck.com: https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.5.0-through-2.9.0-os-command-injection-via-openvpn-learn-address-sh
Credits
Abraxas Labs