CVE-2020-35473Public exploit

Device tracking via allowlist response side channel

Published Nov 8, 2022 · Updated May 1, 2025

Information leakage in Bluetooth Core Specification 4.0 through 5.2 allows physically proximate attackers to identify BLE devices. The allowlist filter responds differently to crafted scan requests carrying captured peer addresses, exposing a response-or-silence oracle despite RPA rotation. Exploitation requires Bluetooth proximity and an allowlist-configured, intermittently disconnected device; it reveals device associations that enable tracking but does not alter data or interrupt service.

CVSS severity4.3
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information leakage in Bluetooth Core Specification 4.0 through 5.2 allows physically proximate attackers to identify BLE devices. The allowlist filter responds differently to crafted scan requests carrying captured peer addresses, exposing a response-or-silence oracle despite RPA rotation. Exploitation requires Bluetooth proximity and an allowlist-configured, intermittently disconnected device; it reveals device associations that enable tracking but does not alter data or interrupt service.

The record

CVE
CVE-2020-35473
Published
Nov 8, 2022
Updated
May 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-203, CWE-294, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-203Observable Discrepancy
CWE-294Authentication Bypass by Capture-replay
T1040Network Sniffing

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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