by Kastro
Paper/Archive/CVE-2026-45158

CVE-2026-45158

opnsense core — OPNsense: Command Injection via Attacker-Controlled DHCP Config

EPSS 0.5%CVSS 9.1
critical.is priorityof 100
36
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 44.9.449 × 209.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
core< 26.1.8–CNA

Scores by source

GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/opnsense/core/security/advisories/GHSA-5rx3-w735-74wm