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CVE-2025-4496— TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow

Quick assessment

Affected
TOTOLINK T10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TOTOLINK A3100R等都是中国吉翁电子（TOTOLINK）公司的产品。TOTOLINK A3100R是一系列无线路由器。TOTOLINK A950RG是一款超世代 Giga 无线路由器。TOTOLINK T10是一款无线网路系统路由器。 TOTOLINK多款产品存在安全漏洞，该漏洞源于文件/cgi-bin/cstecgi.cgi中函数CloudACMunualUpdate的参数FileName操作导致缓冲区溢出。以下产品受到影响：TOTOLINK T10、A3100R、A950RG、A800R、

CVSS 8.8 · High EPSS 1.13% · P64

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-4496

Vulnerability Information
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Vulnerability Title
TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName 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多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A3100R等都是中国吉翁电子（TOTOLINK）公司的产品。TOTOLINK A3100R是一系列无线路由器。TOTOLINK A950RG是一款超世代 Giga 无线路由器。TOTOLINK T10是一款无线网路系统路由器。 TOTOLINK多款产品存在安全漏洞，该漏洞源于文件/cgi-bin/cstecgi.cgi中函数CloudACMunualUpdate的参数FileName操作导致缓冲区溢出。以下产品受到影响：TOTOLINK T10、A3100R、A950RG、A800R、
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 T10 4.1.8cu.5241_B20210927 -
TOTOLINK A3100R 4.1.8cu.5241_B20210927 -
TOTOLINK A950RG 4.1.8cu.5241_B20210927 -
TOTOLINK A800R 4.1.8cu.5241_B20210927 -
TOTOLINK N600R 4.1.8cu.5241_B20210927 -
TOTOLINK A3000RU 4.1.8cu.5241_B20210927 -
TOTOLINK A810R 4.1.8cu.5241_B20210927 -

II. Public POCs for CVE-2025-4496

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10704 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2025-4496

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Other References for CVE-2025-4496 (1)

IV. Related Vulnerabilities

Same product: T10
Same vendor: TOTOLINK
Same weakness: CWE-120

V. Comments for CVE-2025-4496

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