CVE-2025-5901— TOTOLINK T10 POST Request cstecgi.cgi UploadCustomModule buffer overflow
Quick assessment
Affected
TOTOLINK T10
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
TOTOLINK T10是中国吉翁电子（TOTOLINK）公司的一款无线网路系统路由器。 TOTOLINK T10 4.1.8cu.5207版本存在安全漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数File的错误操作,导致缓冲区溢出。
Possible ATT&CK Techniques 3 AI
T1203 · Exploitation for Client Execution T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-5901
Vulnerability Information
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Vulnerability Title
TOTOLINK T10 POST Request cstecgi.cgi UploadCustomModule buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in TOTOLINK T10 4.1.8cu.5207 and classified as critical. This vulnerability affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument File leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public 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
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 T10 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK T10是中国吉翁电子（TOTOLINK）公司的一款无线网路系统路由器。 TOTOLINK T10 4.1.8cu.5207版本存在安全漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数File的错误操作,导致缓冲区溢出。
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
II. Public POCs for CVE-2025-5901
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Same Patch Batch · TOTOLINK · 2025-06-09 · 3 CVEs total
| CVE-2025-5903 | 8.8 HIGH | TOTOLINK T10 POST Request cstecgi.cgi setWiFiAclRules buffer overflow |
| CVE-2025-5902 | 8.8 HIGH | TOTOLINK T10 POST Request cstecgi.cgi setUpgradeFW buffer overflow |
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V. Comments for CVE-2025-5901
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