CVE-2026-111216: Netgate pfSense CE through 2.9.0 OS Command Injection via Gateway Monitor IP

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-15 · updated 2026-10-26
Weakness: CWE-78

Description

Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with gateway edit privileges to execute commands as root by injecting shell metacharacters into an IPv6 link-local zone index. Attackers can set a gateway Monitor IP whose unvalidated zone carries a payload, which start_dpinger() passes unescaped to the dpinger shell command when monitoring is applied.

Affected products

Netgate pfSense CE: through 2.9.0

References

https://abraxaslabs.tech/research/pfsense-ce-leftovers
https://github.com/abraxas/pfsense-gw-ipv6-zone
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/gwlb.inc#L535
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/util.inc#L1418
https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-os-command-injection-via-gateway-monitor-ip

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