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CVE-2020-10135

MediumPublished

Bluetooth devices supporting BR/EDR v5.2 and earlier are vulnerable to impersonation attacks

Published: May 19, 2020
Updated: Sep 17, 2024
Assigning CNA: certcc
Evidence observed: Aug 8, 2026

Primary CVSS

5.4/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

2.4%

Low · next 30 days

Percentile: 82.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Legacy pairing and secure-connections pairing authentication in Bluetooth BR/EDR Core Specification v5.2 and earlier may allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. An unauthenticated, adjacent attacker could impersonate a Bluetooth BR/EDR master or slave to pair with a previously paired remote device to successfully complete the authentication procedure without knowing the link key.

Sources

CVE-2020-10135-BIASPoC
CVE 2020-10135 a.k.a BIAS (Bluetooth Impersonation Attack)

Responsible use

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