CVE-2026-89034Public exploit

Health-data disclosure via unauthenticated Nordic UART Service

Published Sep 16, 2026 · Updated Sep 19, 2026

Missing authentication in TCH QRing R20_B006 firmware RT09R20_1.00.00_250318 allows physically proximate attackers to read health data over BLE. The exposed Nordic UART Service accepts client connections and health-data commands without pairing, client authentication, command authorization, or user approval. Bluetooth Low Energy range is sufficient to bypass the official application and cloud, retrieve historical heart-rate and blood-oxygen records, and activate live monitoring.

CVSS severity7.1
High
EPSS probability0.33%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in TCH QRing R20_B006 firmware RT09R20_1.00.00_250318 allows physically proximate attackers to read health data over BLE. The exposed Nordic UART Service accepts client connections and health-data commands without pairing, client authentication, command authorization, or user approval. Bluetooth Low Energy range is sufficient to bypass the official application and cloud, retrieve historical heart-rate and blood-oxygen records, and activate live monitoring.

The record

CVE
CVE-2026-89034
Published
Sep 16, 2026
Updated
Sep 19, 2026
Vendor
TCH
Product
QRing
Classifications
CWE-306
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=RT09R20_1.00.00_250318

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TCH · QRingversion=RT09R20_1.00.00_250318

Published CVSS scores

7.1VulnCheckCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5VulnCheckCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function

Public exploit references

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Technologies

Your stack

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Your stack

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