SEPTEMBER 15, 2026
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Case File

CVE-2026-51721

CRITICAL · CVSS 9.1 EPSS 0.29% Public Exploit

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

CyberRota Analysis

AI-Generated

TOTOLINK T6 firmware version 4.1.5cu.748_B20211015 is vulnerable due to incorrect access control in the setPairCfg function, allowing unauthenticated attackers to modify the mesh pairing state by sending a specially crafted POST request to /cgi-bin/cstecgi.cgi. This vulnerability could lead to unauthorized access and manipulation of the network's mesh configuration. Network administrators and users of the affected TOTOLINK devices should prioritize immediate remediation to mitigate potential exploitation.

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-2026-51721
Severity
CRITICAL
CVSS
9.1
EPSS
0.29%

Original NVD Description

Incorrect access control in the setPairCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter the mesh pairing state via sending a crafted POST request to /cgi-bin/cstecgi.cgi.