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CVE-2026-45158— OPNsense: Command Injection via Attacker-Controlled DHCP Config

Quick assessment

Affected
opnsense core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Deciso OPNsense是荷兰Deciso公司的一套基于FreeBSD的开源防火墙和路由软件。 Deciso OPNsense 26.1.8之前版本存在参数注入漏洞，该漏洞源于未清理的用户输入被传递到DHCP配置中，并由shell脚本处理，可能导致远程代码执行。

CVSS 9.1 · Critical EPSS 0.82% · P56

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
opnsense core < 26.1.8 affected
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I. Basic Information for CVE-2026-45158

Vulnerability Information
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Vulnerability Title
OPNsense: Command Injection via Attacker-Controlled DHCP Config
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
Deciso OPNsense 参数注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Deciso OPNsense是荷兰Deciso公司的一套基于FreeBSD的开源防火墙和路由软件。 Deciso OPNsense 26.1.8之前版本存在参数注入漏洞，该漏洞源于未清理的用户输入被传递到DHCP配置中，并由shell脚本处理，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
opnsense core < 26.1.8 -

II. Public POCs for CVE-2026-45158

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III. Intelligence Information for CVE-2026-45158

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Vendor Advisories for CVE-2026-45158 (1)

Same Patch Batch · opnsense · 2026-05-13 · 4 CVEs total

CVE-2026-44193 9.1 CRITICAL OPNsense: RCE via XMLRPC endpoint using `opnsense.restore_config_section` method
CVE-2026-44194 9.1 CRITICAL OPNsense: RCE on user managment
CVE-2026-44195 5.3 MEDIUM OPNsense: Authentication lockout bypass

IV. Related Vulnerabilities

Same product: core
Same vendor: opnsense
Same weakness: CWE-88

V. Comments for CVE-2026-45158

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