CVE-2026-45158
Critical
Description
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductOpnsense
PublishedMay 13, 2026
First seenMay 13, 2026
Weakness typeCWE-88CWE-88
How to fix
Update
- opnsense opnsense26.1.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| opnsense opnsense | v < 26.1.8 | 26.1.8 |
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