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CVE-2026-5691— Totolink A7100RU cstecgi.cgi setFirewallType os command injection

CVSS 7.3 · High EPSS 4.74% · P89
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I. Basic Information for CVE-2026-5691

Vulnerability Information
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Vulnerability Title
Totolink A7100RU cstecgi.cgi setFirewallType os command injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setFirewallType of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public 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中函数setFirewallType的参数firewallType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-2026-5691

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7552 chars
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III. Intelligence Information for CVE-2026-5691

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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-2026-56887.3 HIGHTotolink A7100RU cstecgi.cgi setDdnsCfg 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-2026-56927.3 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-2026-5691

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