Vulnerability details

CVE-2026-45158

opnsense core

OPNsense: Command Injection via Attacker-Controlled DHCP Config

CVSS 3.1

9.1Critical

Official 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 scores

Score	Version	Source	Vector
9.1Critical	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
opnsense	core	< 26.1.8	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2026-05-14
Last updated: 2026-05-14
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.53%

Probability of exploitation in 30 days

45%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-88
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')