CVE-2021-28155

Name: CVE-2021-28155
Creator: NVD / NIST
Published: 2021-09-07T06:15:07.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2021-28155 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The Bluetooth Classic implementation on JBL TUNE500BT devices does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown a device by flooding the target device with LMP Feature Response data.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

The Bluetooth Classic implementation on JBL TUNE500BT devices does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown a device by flooding the target device with LMP Feature Response data.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.44%

34.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Jbl	Tune500bt Firmware	All versions

References

https://dl.packetstormsecurity.net/papers/general/braktooth.pdfTechnical Description, Third Party Advisory
https://www.jbl.com.sg/over-ear-headphones/JBL+TUNE500BT.htmlProduct, Vendor Advisory
https://dl.packetstormsecurity.net/papers/general/braktooth.pdfTechnical Description, Third Party Advisory
https://www.jbl.com.sg/over-ear-headphones/JBL+TUNE500BT.htmlProduct, Vendor Advisory

Timeline

Published: Sep 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28155?

How severe is CVE-2021-28155?

CVE-2021-28155 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28155?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28155?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST