CVE-2026-109571

Fire-Boltt BSW013 firmware through V0.0.8 Unauthenticated Heart Rate Disclosure via BLE

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.

Affected

Fire-Boltt · BSW013

CVSS v4.0 VULNCHECK

2.3 LOWCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

4.3 MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.18% chance of exploitation in the next 30 days, 7th percentile

Published

2026-10-12

Proof-of-concept exploits (1)

• Pratham-16/fireboltt-Bsw013-BLE-vuln

References

• CVE Record
• NVD entry

Related

• CVE-2026-109570