SEPTEMBER 15, 2026
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Case File

CVE-2026-51731

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 firmware version 4.1.5cu.748_B20211015 is vulnerable due to improper access control in the delVlanCfg function, enabling unauthenticated attackers to delete VLAN entries by sending a specially crafted POST request to the CGI interface. This vulnerability could lead to unauthorized network configuration changes, potentially disrupting network services. Network administrators and organizations using this firmware should prioritize remediation to prevent 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-2026-51731
Severity
CRITICAL
CVSS
9.1
EPSS
0.36%

Original NVD Description

Incorrect access control in the delVlanCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to remove VLAN entries via sending a crafted POST request to /cgi-bin/cstecgi.cgi.