Vulnerability record · CVE-2026-79911 · published 25 August 2026

CVE-2026-79911: Memory buffer overflow vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 1.1% · top 35.8% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow Deferred

9.3CVSS 4.0 base score, v2 10.0

1.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

6References

27 Aug 2026Last modified by NVD

Description

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TOTOLINK_N600R_cstecgi_strcpy_
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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Source: NIST National Vulnerability Database (record CVE-2026-79911), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.