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CVE-2026-5676— Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication

CVSS 7.3 · High EPSS 0.13% · P32
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I. Basic Information for CVE-2026-5676

Vulnerability Information
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Vulnerability Title
Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack can be launched remotely. The exploit is publicly available and might 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
关键功能的认证机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
TOTOLINK A8000R 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A8000R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A8000R 5.9c.681_B20180413版本存在访问控制错误漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数langType的错误操作，可能导致缺少身份验证。
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
TotolinkA8000R 5.9c.681_B20180413 -

II. Public POCs for CVE-2026-5676

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7328 chars
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III. Intelligence Information for CVE-2026-5676

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

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-2026-56917.3 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 vendor: Totolink
Same weakness: CWE-306

V. Comments for CVE-2026-5676

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