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CVE-2026-5688— Totolink A7100RU cstecgi.cgi setDdnsCfg os command injection

CVSS 7.3 · High EPSS 4.74% · P89
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I. Basic Information for CVE-2026-5688

Vulnerability Information
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Vulnerability Title
Totolink A7100RU cstecgi.cgi setDdnsCfg os command injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数provider的错误操作，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)

Affected Products

VendorProductAffected VersionsCPESubscribe
TotolinkA7100RU 7.4cu.2313_b20191024 cpe:2.3:o:totolink:a7100ru_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5688

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7898 chars
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III. Intelligence Information for CVE-2026-5688

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Same Patch Batch · Totolink · 2026-04-06 · 9 CVEs total

CVE-2026-56767.3 HIGHTotolink A8000R cstecgi.cgi setLanguageCfg missing authentication
CVE-2026-56777.3 HIGHTotolink A7100RU cstecgi.cgi CsteSystem os command injection
CVE-2026-56787.3 HIGHTotolink A7100RU cstecgi.cgi setScheduleCfg os command injection
CVE-2026-56897.3 HIGHTotolink A7100RU cstecgi.cgi setNtpCfg os command injection
CVE-2026-56907.3 HIGHTotolink A7100RU cstecgi.cgi setRemoteCfg os command injection
CVE-2026-56917.3 HIGHTotolink A7100RU cstecgi.cgi setFirewallType os command injection
CVE-2026-56927.3 HIGHTotolink A7100RU cstecgi.cgi setGameSpeedCfg os command injection
CVE-2026-56795.5 MEDIUMTotolink A3300R cstecgi.cgi vsetTr069Cfg os command injection

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-5688

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