CVE-2025-4850— TOTOLINK N300RH cstecgi.cgi setUnloadUserData command injection
Quick assessment
Affected
TOTOLINK N300RH
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 N300RH是中国吉翁电子（TOTOLINK）公司的一款长距离无线路由器。 TOTOLINK N300RH 6.1c.1390_B20191101版本存在注入漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数plugin_name的错误操作导致命令注入。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-4850
Vulnerability Information
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Vulnerability Title
TOTOLINK N300RH cstecgi.cgi setUnloadUserData command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability classified as critical has been found in TOTOLINK N300RH 6.1c.1390_B20191101. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name leads to command injection. It is possible to initiate the attack 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:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK N300RH 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK N300RH是中国吉翁电子（TOTOLINK）公司的一款长距离无线路由器。 TOTOLINK N300RH 6.1c.1390_B20191101版本存在注入漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数plugin_name的错误操作导致命令注入。
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
II. Public POCs for CVE-2025-4850
| # | POC Description | Source Link | Shenlong Link |
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Same Patch Batch · TOTOLINK · 2025-05-18 · 4 CVEs total
| CVE-2025-4851 | 6.3 MEDIUM | TOTOLINK N300RH cstecgi.cgi setUploadUserData command injection |
| CVE-2025-4849 | 6.3 MEDIUM | TOTOLINK N300RH cstecgi.cgi CloudACMunualUpdateUserdata command injection |
| CVE-2025-4852 | 2.4 LOW | TOTOLINK A3002R VPN Page cross site scripting |
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V. Comments for CVE-2025-4850
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