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CVE-2026-6168— TOTOLINK A7000R cstecgi.cgi setWiFiEasyGuestCfg stack-based overflow

Quick assessment

Affected
TOTOLINK A7000R
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 A7000R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A7000R 9.1.0u.6115及之前版本存在安全漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数ssid5g的错误操作，可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 0.79% · P55
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I. Basic Information for CVE-2026-6168

Vulnerability Information
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Vulnerability Title
TOTOLINK A7000R cstecgi.cgi setWiFiEasyGuestCfg stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in TOTOLINK A7000R up to 9.1.0u.6115. The affected element is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid5g causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK A7000R 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A7000R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A7000R 9.1.0u.6115及之前版本存在安全漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数ssid5g的错误操作，可能导致栈缓冲区溢出。
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

Vendor Product Affected Versions CPE Subscribe
TOTOLINK A7000R 9.1.0u.6115 cpe:2.3:o:totolink:a7000r_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6168

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III. Intelligence Information for CVE-2026-6168

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Same Patch Batch · TOTOLINK · 2026-04-13 · 11 CVEs total

CVE-2026-6195 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setPasswordCfg os command injection
CVE-2026-6156 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setIpQosRules os command injection
CVE-2026-6155 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setWanCfg os command injection
CVE-2026-6154 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setWizardCfg os command injection
CVE-2026-6140 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi UploadFirmwareFile os command injection
CVE-2026-6139 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi UploadOpenVpnCert os command injection
CVE-2026-6138 9.8 CRITICAL Totolink A7100RU CGI cstecgi.cgi setAccessDeviceCfg os command injection
CVE-2026-6194 8.8 HIGH Totolink A3002MU HTTP Request formWlanSetup sub_410188 stack-based overflow
CVE-2026-6157 8.8 HIGH Totolink A800R app.so setAppEasyWizardConfig buffer overflow
CVE-2026-6158 7.3 HIGH Totolink N300RH upgrade.so setUpgradeUboot os command injection

IV. Related Vulnerabilities

Same product: A7000R
Same vendor: TOTOLINK
Same weakness: CWE-121

V. Comments for CVE-2026-6168

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