SEPTEMBER 15, 2026
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Case File

CVE-2026-51690

CRITICAL · CVSS 9.1 EPSS 0.36% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-31 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

TOTOLINK T6 devices running firmware version 4.1.5cu.748_B20211015 are vulnerable due to incorrect access control in the setWanCfg function, allowing unauthenticated attackers to modify upstream provisioning and connectivity by sending a specially crafted POST request to the CGI interface. This vulnerability could lead to unauthorized network access and potential disruption of service. Network administrators and security teams managing affected devices should prioritize this issue to mitigate risks associated with unauthorized access and service manipulation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-51690
Severity
CRITICAL
CVSS
9.1
EPSS
0.36%

Original NVD Description

Incorrect access control in the setWanCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter upstream provisioning and connectivity via sending a crafted POST request to /cgi-bin/cstecgi.cgi.