SEPTEMBER 15, 2026
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Case File

CVE-2026-51770

CRITICAL · CVSS 9.8 EPSS 0.44% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The sendToMasterQosConfig function in TOTOLINK T6 version 4.1.5cu.748_B20211015 has an incorrect access control vulnerability that permits unauthenticated attackers to send malicious QoS settings to the master by crafting specific MQTT messages directed at the cs_broker component. This flaw could lead to unauthorized manipulation of network quality settings, potentially disrupting service or enabling further attacks. Organizations using this router model should prioritize addressing 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-2026-51770
Severity
CRITICAL
CVSS
9.8
EPSS
0.44%

Original NVD Description

Incorrect access control in the sendToMasterQosConfig function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to forward attacker-controlled QoS settings to the master via sending a crafted MQTT message to the cs_broker component..