CVE-2026-109571
Medium
Description
Fire-Boltt BSW013 smartwatch firmware through V0.0.8 contains a missing authentication vulnerability that allows unpaired BLE devices to subscribe to the Heart Rate Measurement characteristic (0x2A37). Attackers within Bluetooth range can receive the wearer's live heart rate readings without pairing, bonding, or any confirmation on the watch.
SeverityMedium
CVSS4.3
Exploit probability7. percentile0.2%
ProductBSW013
PublishedOct 12, 2026
First seenOct 12, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Fire-Boltt BSW013 | v ≤ V0.0.8 | — |
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