CVE-2026-109571: Missing Authentication for Critical Function in Fire-Boltt BSW013
Description
Fire-Boltt BSW013 smartwatch firmware versions up to 0.0.8 have a missing authentication vulnerability that allows unpaired Bluetooth Low Energy (BLE) devices to subscribe to the Heart Rate Measurement characteristic. This enables attackers within Bluetooth range to receive live heart rate data without pairing or user confirmation. The vulnerability has a low CVSS score of 2.3 and does not have known exploits in the wild. No patch or remediation information is currently provided.
CVSS v4.0
Score 2.3low
Affected software
Fire-Boltt
BSW013
pkg:github/pratham-16/fireboltt-Bsw013-BLE-vulnRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109571 describes a missing authentication vulnerability in Fire-Boltt BSW013 smartwatch firmware through version 0.0.8. The flaw allows unpaired BLE devices to subscribe to the Heart Rate Measurement characteristic (UUID 0x2A37) without requiring pairing, bonding, or user confirmation on the watch. This permits attackers within Bluetooth range to passively receive the wearer's live heart rate readings. The vulnerability has a CVSS 4.0 base score of 2.3, indicating low severity. There is no vendor advisory or patch information available at this time.
Potential Impact
An attacker within Bluetooth range can obtain live heart rate data from the affected smartwatch without any authentication or user interaction. This could lead to privacy violations by exposing sensitive biometric information. However, the impact is limited to data disclosure of heart rate readings only, with no indication of further device compromise or control.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider disabling Bluetooth or limiting device exposure in untrusted environments to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-12T19:27:55.043Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acd4b482cdf04f656d3ef73
Added to database: 10/12/2026, 21:04:08 UTC
Last enriched: 10/12/2026, 21:19:00 UTC
Last updated: 10/12/2026, 21:19:03 UTC
Views: 8
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