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CVE-2026-5975— Totolink A7100RU CGI cstecgi.cgi setDmzCfg os command injection

Quick assessment

Affected
Totolink A7100RU
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TOTOLINK A7100RU是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 Totolink A7100RU 7.4cu.2313_b20191024版本存在操作系统命令注入漏洞，该漏洞源于对CGI Handler组件中/cgi-bin/cstecgi.cgi文件setDmzCfg函数参数wanIdx的操作，可能导致os命令注入攻击。

CVSS 9.8 · Critical EPSS 3.25% · P88

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5975

Vulnerability Information
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Vulnerability Title
Totolink A7100RU CGI cstecgi.cgi setDmzCfg os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wanIdx leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.
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
TOTOLINK A7100RU 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A7100RU是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 Totolink A7100RU 7.4cu.2313_b20191024版本存在操作系统命令注入漏洞，该漏洞源于对CGI Handler组件中/cgi-bin/cstecgi.cgi文件setDmzCfg函数参数wanIdx的操作，可能导致os命令注入攻击。
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
Totolink A7100RU 7.4cu.2313_b20191024 cpe:2.3:o:totolink:a7100ru_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5975

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6902 chars
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III. Intelligence Information for CVE-2026-5975

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Other References for CVE-2026-5975 (1)

Same Patch Batch · Totolink · 2026-04-09 · 9 CVEs total

CVE-2026-5978 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setWiFiAclRules os command injection
CVE-2026-5977 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setWiFiBasicCfg os command injection
CVE-2026-5976 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setStorageCfg os command injection
CVE-2026-5854 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setWiFiEasyCfg os command injection
CVE-2026-5853 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection
CVE-2026-5852 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setIptvCfg os command injection
CVE-2026-5851 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setUPnPCfg os command injection
CVE-2026-5850 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setVpnPassCfg os command injection

IV. Related Vulnerabilities

Same product: A7100RU
Same vendor: Totolink
Same weakness: CWE-78

V. Comments for CVE-2026-5975

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