VulnerabilityAnalyzed

CVE-2026-45158

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.

CRITICAL 9.1EPSS 0.53%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.53% probability · 43th percentile
CISA KEV: Not listed
Weakness: CWE-88
Affected: opnsense/opnsense
Source: security-advisories@github.com

References

https://github.com/opnsense/core/security/advisories/GHSA-5rx3-w735-74wmVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.