CVE-2026-89034: TCH QRing R20_B006 Unauthenticated BLE Access
TCH QRing smart ring model R20B006 running firmware RT09R201.00.00250318 contains an unauthenticated Bluetooth Low Energy access vulnerability that allows any nearby attacker to connect to the device without pairing, authentication, or user approval by exploiting the exposed Nordic UART Service which enforces no client authentication or command authorization. Attackers within Bluetooth Low Energy range can connect directly to the ring, bypassing the official application and cloud authentication, to read battery levels, activate live heart rate monitoring, and retrieve stored historical heart rate and blood oxygen records.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
Any attacker within Bluetooth Low Energy range of an affected ring can exploit it. No pairing, prior access, authentication, or user approval is required.
What access does the exposed service provide?
An attacker can read battery levels, start live heart rate monitoring, and retrieve stored historical heart rate and blood oxygen records. The attacker can do this directly over Bluetooth Low Energy without using the official application or cloud authentication.
Is user interaction required for exploitation?
No. The issue is reachable over Bluetooth Low Energy and does not require privileges or user interaction.