SEPTEMBER 15, 2026
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Case File

CVE-2026-51760

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

TOTOLINK T6 firmware version 4.1.5cu.748_B20211015 is vulnerable due to improper access control in the informSyncUpgfw function, enabling unauthenticated attackers to initiate mass firmware updates on mesh slave devices by sending specially crafted MQTT messages to the cs_broker component. This vulnerability poses a significant risk as it could lead to unauthorized firmware modifications, potentially compromising the integrity and security of the affected devices. Organizations using this firmware should prioritize remediation to prevent exploitation and ensure the security of their network infrastructure.

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-2026-51760
Severity
CRITICAL
CVSS
9.8
EPSS
0.44%

Original NVD Description

Incorrect access control in the informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves via sending a crafted MQTT message to the cs_broker component.