CVE-2026-45158

Received
Published: 13 May 2026, 21:54
Last modified:13 May 2026, 21:54

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.1 CRITICAL
v3.1 (cve.org)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 May 2026, 21:54
Published
Vulnerability first disclosed

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 Metrics

  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Techniques & Countermeasures

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

    The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.

Affected Systems

  • opnsense•core

    < 26.1.8

References (1)