Bluetooth Downgrade Attack in Android BTM

Publication date: 2026-09-08

Last updated on: 2026-09-15

Assigner: Android (associated with Google Inc. or Open Handset Alliance)

Description

In btm_sec_encrypt_change of btm_sec.cc, there is a possible downgrade attack due to a logic error in the code. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-15

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-28627

Affected Vendors & Products

Vendor	Product	Version / Range
google	android	16.0
google	android	17.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Executive Summary

This vulnerability is a downgrade attack in the Bluetooth security encryption process. It occurs in the function btm_sec_encrypt_change due to a logic error, allowing an attacker to force a weaker encryption method. This could expose sensitive information during transmission without requiring additional privileges or user interaction.

Impact Analysis

If exploited, this vulnerability could allow an attacker to intercept and read encrypted Bluetooth communications. This might expose personal data, messages, or other sensitive information transmitted between devices. The attack does not require special permissions or user action.

Mitigation Strategies

Apply the latest security patches or updates provided by the vendor to address the logic error in btm_sec_encrypt_change of btm_sec.cc. Monitor official Android security bulletins for patches related to this CVE.

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