CVE-2026-1686— Totolink A3600R app.so setAppEasyWizardConfig buffer overflow
Quick assessment
Affected
Totolink A3600R
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 A3600R是中国吉翁电子（TOTOLINK）公司的一款 6 天线 1200M 无线路由器。 TOTOLINK A3600R 5.9c.4959版本存在安全漏洞，该漏洞源于/lib/cste_modules/app.so库中setAppEasyWizardConfig函数对参数apcliSsid的操作导致缓冲区溢出，可能导致远程代码执行。
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1686
Vulnerability Information
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Vulnerability Title
Totolink A3600R app.so setAppEasyWizardConfig buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in Totolink A3600R 5.9c.4959. This issue affects the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. Performing a manipulation of the argument apcliSsid results in buffer overflow. It is possible to initiate the attack 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:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK A3600R 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A3600R是中国吉翁电子（TOTOLINK）公司的一款 6 天线 1200M 无线路由器。 TOTOLINK A3600R 5.9c.4959版本存在安全漏洞，该漏洞源于/lib/cste_modules/app.so库中setAppEasyWizardConfig函数对参数apcliSsid的操作导致缓冲区溢出，可能导致远程代码执行。
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
II. Public POCs for CVE-2026-1686
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Vendor Advisories for CVE-2026-1686 (1)
Proof of Concept for CVE-2026-1686 (1)
Other References for CVE-2026-1686 (1)
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V. Comments for CVE-2026-1686
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