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CVE-2026-6112— Totolink A7100RU CGI cstecgi.cgi setRadvdCfg os command injection

Quick assessment

Affected
Totolink A7100RU
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.

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CGI Handler组件中文件/cgi-bin/cstecgi.cgi的setRadvdCfg函数对参数maxRtrAdvInterval处理不当，可能导致os命令注入。

CVSS 9.8 · Critical EPSS 3.25% · P88
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I. Basic Information for CVE-2026-6112

Vulnerability Information
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Vulnerability Title
Totolink A7100RU CGI cstecgi.cgi setRadvdCfg os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument maxRtrAdvInterval causes os command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.
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CGI Handler组件中文件/cgi-bin/cstecgi.cgi的setRadvdCfg函数对参数maxRtrAdvInterval处理不当，可能导致os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
Totolink A7100RU 7.4cu.2313_b20191024 cpe:2.3:o:totolink:a7100ru_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6112

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III. Intelligence Information for CVE-2026-6112

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Other References for CVE-2026-6112 (1)

Same Patch Batch · Totolink · 2026-04-12 · 7 CVEs total

CVE-2026-6132 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setLedCfg os command injection
CVE-2026-6131 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setTracerouteCfg os command injection
CVE-2026-6116 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setDiagnosisCfg os command injection
CVE-2026-6115 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setAppCfg os command injection
CVE-2026-6114 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setNetworkCfg os command injection
CVE-2026-6113 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setTtyServiceCfg os command injection

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-6112

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