CVE-2026-45158CWE-88

OPNsense: Command Injection via Attacker-Controlled DHCP Config

Critical · published May 13, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
56.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00822 · 56.9th percentile
Weakness
CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2026-05-13T21:54Z
EPSS history
Timeline
  • 13 MAY 21:54Z
    OPNsense: Command Injection via Attacker-Controlled DHCP Config
    cvelistv5