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CRITICAL

CVE-2026-79911

TOTOLINK N600R CGI cstecgi.cgi setSystemConfig stack-based overflow

CVSS v3

10

CRITICAL

EPSS Score

1.1 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-08-25
Last Modified
2026-08-26

Frequently asked questions

What is CVE-2026-79911?

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.

Is CVE-2026-79911 actively exploited?

Active exploitation of CVE-2026-79911 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-79911?

CVE-2026-79911 has a CVSS v3 base score of 10 (CRITICAL severity).

Is CVE-2026-79911 affecting your environment?

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