# CVE-2026-79911

## Summary

- **CVE ID:** CVE-2026-79911
- **Severity:** CRITICAL
- **CVSS Score:** 10 (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)
- **CWE:** CWE-121, CWE-119
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 27, 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.

## Affected Products

- TOTOLINK — N600R (4.3.0cu.7647_B20210106)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.64%
- **EPSS Percentile:** 49.2

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._