SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityDeferred

CVE-2026-51750

Incorrect access control in the updatePriChannel function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to rescan and switch the primary mesh channel via sending a crafted MQTT message to the cs_broker component.

CRITICAL 9.8EPSS 0.44%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Incorrect access control in the updatePriChannel function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to rescan and switch the primary mesh channel via sending a crafted MQTT message to the cs_broker component.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.44% probability · 37th percentile
CISA KEV
Not listed
Weakness
CWE-284
Source
cve@mitre.org

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.