CVE-2026-45158: Opnsense

Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days.

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, unsanitized user input is passed to the DHCP configuration of the configured interface, which is processed by a shell script, allowing remote code execution as root on the underlying operating system. This vulnerability is fixed in 26.1.8.

Affected products

• Opnsense Opnsense: before 26.1.8 (fixed in 26.1.8)

Published 2026-05-13. Last modified 2026-06-17.