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CVE-2026-5994— Totolink A7100RU CGI cstecgi.cgi setTelnetCfg 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，该漏洞源于组件CGI Handler的文件/cgi-bin/cstecgi.cgi中setTelnetCfg函数对参数telnet_enabled的操作缺乏适当验证，可能导致os命令注入。

CVSS 9.8 · Critical EPSS 1.80% · P77
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I. Basic Information for CVE-2026-5994

Vulnerability Information
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Vulnerability Title
Totolink A7100RU CGI cstecgi.cgi setTelnetCfg os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This issue affects the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument telnet_enabled results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may 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，该漏洞源于组件CGI Handler的文件/cgi-bin/cstecgi.cgi中setTelnetCfg函数对参数telnet_enabled的操作缺乏适当验证，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-2026-5994

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10543 chars
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III. Intelligence Information for CVE-2026-5994

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Other References for CVE-2026-5994 (1)

Same Patch Batch · Totolink · 2026-04-10 · 10 CVEs total

CVE-2026-6029 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setVpnAccountCfg os command injection
CVE-2026-6028 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setPptpServerCfg os command injection
CVE-2026-6027 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setUrlFilterRules os command injection
CVE-2026-6026 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setPortalConfWeChat os command injection
CVE-2026-6025 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setSyslogCfg os command injection
CVE-2026-5997 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setLoginPasswordCfg os command injection
CVE-2026-5996 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setAdvancedInfoShow os command injection
CVE-2026-5995 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setMiniuiHomeInfoShow os command injection
CVE-2026-5993 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setWiFiGuestCfg os command injection

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-5994

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