SEPTEMBER 15, 2026
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Case File

CVE-2026-51677

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 setUPnPCfg function, allowing unauthenticated attackers to manipulate UPnP service states through crafted POST requests to /cgi-bin/cstecgi.cgi. This vulnerability could lead to unauthorized changes in network configurations, potentially exposing the device to further attacks or misuse. Organizations using this firmware should prioritize patching or mitigating this vulnerability to safeguard their network integrity.

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-2026-51677
Severity
CRITICAL
CVSS
9.1
EPSS
0.29%

Original NVD Description

Incorrect access control in the setUPnPCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to change UPnP service state via sending a crafted POST request to /cgi-bin/cstecgi.cgi.