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CVE-2026-27175— MajorDoMo Command Injection in rc/index.php via Race Condition

Quick assessment

Affected
sergejey MajorDoMo
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MajorDoMo是MajorDoMo社区的一个开源DIY智能家居自动化平台。 MajorDoMo存在操作系统命令注入漏洞，该漏洞源于rc/index.php中来自用户输入的$param变量未经清理直接插入到双引号内的命令字符串中，该命令通过safe_exec()插入数据库队列，而cycle_execs.php脚本在无需身份验证的情况下检索排队的命令并将其直接传递给exec()，攻击者可利用竞争条件实现操作系统命令注入。

CVSS 9.8 · Critical EPSS 7.18% · P94

Public Exploits 1

Metasploit · 1 majordomo_cmd_injection_rce.rb [exploit]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
sergejey MajorDoMo ≤ * affected
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I. Basic Information for CVE-2026-27175

Vulnerability Information
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Vulnerability Title
MajorDoMo Command Injection in rc/index.php via Race Condition
Source: CVE Program / CVE List V5
Vulnerability Description
MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated OS command injection via rc/index.php. The $param variable from user input is interpolated into a command string within double quotes without sanitization via escapeshellarg(). The command is inserted into a database queue by safe_exec(), which performs no sanitization. The cycle_execs.php script, which is web-accessible without authentication, retrieves queued commands and passes them directly to exec(). An attacker can exploit a race condition by first triggering cycle_execs.php (which purges the queue and enters a polling loop), then injecting a malicious command via the rc endpoint while the worker is polling. The injected shell metacharacters expand inside double quotes, achieving remote code execution within one second.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
MajorDoMo 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MajorDoMo是MajorDoMo社区的一个开源DIY智能家居自动化平台。 MajorDoMo存在操作系统命令注入漏洞，该漏洞源于rc/index.php中来自用户输入的$param变量未经清理直接插入到双引号内的命令字符串中，该命令通过safe_exec()插入数据库队列，而cycle_execs.php脚本在无需身份验证的情况下检索排队的命令并将其直接传递给exec()，攻击者可利用竞争条件实现操作系统命令注入。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
sergejey MajorDoMo 0 ~ * -

II. Public POCs for CVE-2026-27175

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III. Intelligence Information for CVE-2026-27175

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Patches & Fixes for CVE-2026-27175 (1)

Security Blog Posts for CVE-2026-27175 (1)

Same Patch Batch · sergejey · 2026-02-18 · 8 CVEs total

CVE-2026-27180 9.8 CRITICAL MajorDoMo Supply Chain Remote Code Execution via Update URL Poisoning
CVE-2026-27174 9.8 CRITICAL MajorDoMo Unauthenticated Remote Code Execution via Admin Console Eval
CVE-2026-27179 8.2 HIGH MajorDoMo Unauthenticated SQL Injection in Commands Module
CVE-2026-27181 7.5 HIGH MajorDoMo Unauthenticated Module Uninstall via Market Endpoint
CVE-2026-27177 7.2 HIGH MajorDoMo Stored Cross-Site Scripting via Property Set Endpoint
CVE-2026-27178 7.2 HIGH MajorDoMo Stored Cross-Site Scripting via Method Parameters to Shoutbox
CVE-2026-27176 6.1 MEDIUM MajorDoMo Reflected Cross-Site Scripting in command.php

IV. Related Vulnerabilities

Same product: MajorDoMo
Same vendor: sergejey
Same weakness: CWE-78

V. Comments for CVE-2026-27175

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