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Vulnerability record · CVE-2020-35473 · published 8 November 2022

CVE-2020-35473: Bluetooth core specification observable discrepancy vulnerability

Bluetooth · Bluetooth Core Specification

An information leakage vulnerability in the Bluetooth Low Energy advertisement scan response in Bluetooth Core Specifications 4.0 through 5.2, and extended scan response in Bluetooth Core Specifications 5.0 through 5.2, may be used to identify devices using Resolvable Private Addressing (RPA) by their response or non-response to specific scan requests from remote addresses. RPAs that have been associated with a specific remote device may also be used to identify a peer in the same manner by using its reaction to an active scan request. This has also been called an allowlist-based side channel.

4.3 CVSS 3.1 Medium EPSS 0.35% · top 73.5% CWE-203 · Observable discrepancyCWE-294 · Authentication bypass by capture-replay
4.3CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An information leakage vulnerability in the Bluetooth Low Energy advertisement scan response in Bluetooth Core Specifications 4.0 through 5.2, and extended scan response in Bluetooth Core Specifications 5.0 through 5.2, may be used to identify devices using Resolvable Private Addressing (RPA) by their response or non-response to specific scan requests from remote addresses. RPAs that have been associated with a specific remote device may also be used to identify a peer in the same manner by using its reaction to an active scan request. This has also been called an allowlist-based side channel.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://dl.acm.org/doi/10.1145/3548606.3559372 Technical DescriptionThird Party Advisory
https://www.sigsac.org/ccs/CCS2022/proceedings/ccs-proceedings.html Technical DescriptionThird Party Advisory
https://dl.acm.org/doi/10.1145/3548606.3559372 Technical DescriptionThird Party Advisory
https://www.sigsac.org/ccs/CCS2022/proceedings/ccs-proceedings.html Technical DescriptionThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-35473), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.