Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-79911— TOTOLINK N600R CGI cstecgi.cgi setSystemConfig stack-based overflow

Quick assessment

Affected
TOTOLINK N600R
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 n600r是中国TOTOLINK公司的一款双频无线路由器。 TOTOLINK n600r 4.3.0cu.7647_B20210106版本存在缓冲区错误漏洞，该漏洞源于CGI Handler组件setSystemConfig函数对/cgi-bin/cstecgi.cgi文件中Hostname参数的操作不当，导致栈缓冲区溢出，攻击者可远程利用。

CVSS 10.0 · Critical EPSS 1.10% · P65

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TOTOLINK N600R 4.3.0cu.7647_B20210106 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-79911

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
TOTOLINK N600R CGI cstecgi.cgi setSystemConfig stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in TOTOLINK N600R 4.3.0cu.7647_B20210106. The affected element is the function setSystemConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument Hostname leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 n600r 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK n600r是中国TOTOLINK公司的一款双频无线路由器。 TOTOLINK n600r 4.3.0cu.7647_B20210106版本存在缓冲区错误漏洞，该漏洞源于CGI Handler组件setSystemConfig函数对/cgi-bin/cstecgi.cgi文件中Hostname参数的操作不当，导致栈缓冲区溢出，攻击者可远程利用。
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 N600R 4.3.0cu.7647_B20210106 cpe:2.3:o:totolink:n600r_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-79911

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7709 chars
Pro+ exclusive includes:
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
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-79911

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-79911 (1)

Proof of Concept for CVE-2026-79911 (2)

News Coverage for CVE-2026-79911 (1)

IV. Related Vulnerabilities

Same product: N600R
Same vendor: TOTOLINK
Same weakness: CWE-121

V. Comments for CVE-2026-79911

No comments yet

Leave a comment