What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-25 · updated 2026-08-27
• Weakness: CWE-119

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.

Affected products

• TOTOLINK N600R: 4.3.0cu.7647_B20210106

References

• https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TOTOLINK_N600R_cstecgi_strcpy_sprintf_Multi_Function_Stack_Overflow.md
• https://vuldb.com/cve/CVE-2026-79911
• https://vuldb.com/submit/881258
• https://vuldb.com/vuln/395061
• https://vuldb.com/vuln/395061/cti
• https://www.totolink.net/

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