CVE-2026-45158: CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in opnsense core
CVE-2026-45158 is a critical vulnerability in OPNsense core versions prior to 26. 1. 8. It involves improper neutralization of argument delimiters in a command, specifically in the DHCP configuration processing. Unsanitized user input is passed to a shell script, which can lead to remote code execution with root privileges on the underlying FreeBSD operating system. This vulnerability is fixed in version 26. 1. 8. The CVSS score is 9. 1, indicating a critical severity level.
AI Analysis
Technical Summary
OPNsense core before version 26.1.8 contains a command injection vulnerability (CWE-88) due to unsanitized user input being passed to the DHCP configuration shell script. This allows an attacker with the required privileges to execute arbitrary commands as root on the system. The vulnerability is resolved in version 26.1.8.
Potential Impact
Successful exploitation allows remote code execution as root on the underlying operating system, leading to full system compromise. The vulnerability affects the DHCP configuration processing component of OPNsense core and can result in complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
A fix is available in OPNsense core version 26.1.8. Users should upgrade to version 26.1.8 or later to remediate this vulnerability. No additional mitigation guidance is provided or required beyond applying the official update.
CVE-2026-45158: CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in opnsense core
Description
CVE-2026-45158 is a critical vulnerability in OPNsense core versions prior to 26. 1. 8. It involves improper neutralization of argument delimiters in a command, specifically in the DHCP configuration processing. Unsanitized user input is passed to a shell script, which can lead to remote code execution with root privileges on the underlying FreeBSD operating system. This vulnerability is fixed in version 26. 1. 8. The CVSS score is 9. 1, indicating a critical severity level.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OPNsense core before version 26.1.8 contains a command injection vulnerability (CWE-88) due to unsanitized user input being passed to the DHCP configuration shell script. This allows an attacker with the required privileges to execute arbitrary commands as root on the system. The vulnerability is resolved in version 26.1.8.
Potential Impact
Successful exploitation allows remote code execution as root on the underlying operating system, leading to full system compromise. The vulnerability affects the DHCP configuration processing component of OPNsense core and can result in complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
A fix is available in OPNsense core version 26.1.8. Users should upgrade to version 26.1.8 or later to remediate this vulnerability. No additional mitigation guidance is provided or required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-08T20:44:38.964Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a052a70cbff5d86103e0d89
Added to database: 5/14/2026, 1:50:40 AM
Last enriched: 5/14/2026, 1:51:21 AM
Last updated: 5/14/2026, 4:14:37 AM
Views: 32
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