CVE-2026-109571
CVE-2026-109571
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.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- github.com/Pratham-16/fireboltt-Bsw013-BLE-vuln (technical-description, exploit)
- www.vulncheck.com/advisories/fire-boltt-bsw013-firmware-through-v0-0.8-unauthen… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109571?
- CVE-2026-109571 is a medium-severity vulnerability, classified under Missing Authentication for Critical Function. CVSS score: 4.3/10. Published 2026-10-12.
- How severe is CVE-2026-109571?
- Medium severity. CVSS v3 base score is 4.3 out of 10.