CVE-2026-111226
High
Description
pfSense CE 2.4.5 through 2.9.0 contains an OS command injection vulnerability that allows authenticated WebGUI users with Advanced Admin Access privilege to execute commands as root via Login Protection settings. Attackers can submit sshguard threshold, block time, or detection time values containing newlines or $(...) that are written unvalidated to sshguard.conf and sourced as root on restart.
SeverityHigh
CVSS7.2
Exploit probability—
ProductpfSense CE
PublishedOct 15, 2026
First seenOct 15, 2026
Weakness typeCWE-78OS command injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Netgate pfSense CE | 2.4.5 ≤ v ≤ 2.9.0 | — |
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