CVE-2026-79911
TOTOLINK N600R CGI cstecgi.cgi setSystemConfig stack-based overflow
- State
- Published
- Severity
- 10.0 Critical
- Published
- Aug 25, 2026
- Updated
- Aug 27, 2026
- Reserved
- Aug 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 10.0 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P | VulDB |
| 3.1 | 10.0 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 3.0 | 10.0 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 10.0 High | AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
N600RTOTOLINK |
|
References
- VDB-395061 | TOTOLINK N600R CGI cstecgi.cgi setSystemConfig stack-based overflowvdb-entrytechnical-description
- VDB-395061 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-79911 | CVE Analysis and Reportthird-party-advisory
- Submit #881258 | Totolink N600R Wireless N Router V4.3.0cu.7647_B20210106 Stack-based Buffer Overflowthird-party-advisory
- https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TOTOLINK_N600R_cstecgi_strcpy_sprintf_Multi_Function_Stack_Overflow.mdexploit
- https://www.totolink.net/product
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