CVE-2020-15802

Name: CVE-2020-15802
Creator: NVD / NIST
Published: 2020-09-11T14:15:11.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 7.14%

Last modified Jun 17, 2026

CVE-2020-15802 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Devices supporting Bluetooth before 5.1 may allow man-in-the-middle attacks, aka BLURtooth. Cross Transport Key Derivation in Bluetooth Core Specification v4.2 and v5.0 may permit an unauthenticated user to establish a bonding with one transport, either LE or BR/EDR, and replace a bonding already established on the opposing transport, BR/EDR or LE, potentially overwriting an authenticated key with an unauthenticated key, or a key with greater entropy with one with less.. EPSS estimates a 7.14% chance of exploitation in the next 30 days.

Description

Devices supporting Bluetooth before 5.1 may allow man-in-the-middle attacks, aka BLURtooth. Cross Transport Key Derivation in Bluetooth Core Specification v4.2 and v5.0 may permit an unauthenticated user to establish a bonding with one transport, either LE or BR/EDR, and replace a bonding already established on the opposing transport, BR/EDR or LE, potentially overwriting an authenticated key with an unauthenticated key, or a key with greater entropy with one with less.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

7.14%

93.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Bluetooth	Bluetooth Core Specification	< 5.1

References

https://gizmodo.com/bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709Third Party Advisory
https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth/Vendor Advisory
https://www.kb.cert.org/vuls/id/589825Third Party Advisory, US Government Resource
https://gizmodo.com/bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709Third Party Advisory
https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth/Vendor Advisory
https://www.kb.cert.org/vuls/id/589825Third Party Advisory, US Government Resource

Timeline

Published: Sep 11, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15802?

How severe is CVE-2020-15802?

CVE-2020-15802 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 7.14% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15802?

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-2020-15802?

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

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Source: NVD / NIST