CVE-2026-79911criticalCWE-119CWE-121

CVE-2026-79911: critical vulnerability in TOTOLINK N600R

TOTOLINK N600R CGI cstecgi.cgi setSystemConfig stack-based overflow

Published · Updated

Follow this CVE+ Monitor N600R

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

48Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 10epss 1.1%
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.
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
Affected products
TOTOLINK · N600R
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — TOTOLINK N600R

In the same product, most dangerous first.

CVE-2025-9935MEDIUMTOTOLINK N600R cstecgi.cgi sub_4159F8 command injectionEPSS 2.7%CVE-2026-79912MEDIUMTOTOLINK N600R cstecgi.cgi getCurrentTime command injectionEPSS 2.1%CVE-2025-4496HIGHTOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflowEPSS 1.2%CVE-2025-8181HIGHTOTOLINK N600R/X2000R FTP Service vsftpd.conf least privilege violationEPSS 1.1%CVE-2025-11444HIGHTOTOLINK N600R HTTP Request cstecgi.cgi setWiFiBasicConfig buffer overflowEPSS 1.1%CVE-2026-82555MEDIUMTOTOLINK N600R Authentication cstecgi.cgi loginAuth random valuesEPSS 0.7%