Is CVE-2021-31615 actively exploited?

No active exploitation of CVE-2021-31615 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-31615 be exploited remotely?

Partially. CVE-2021-31615 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2021-31615?

CVE-2021-31615 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2021-31615

CWE-362Published: June 25, 2021· Updated: Jun 17, 2026

5.3

CVSS v3.1

Official Description

Unencrypted Bluetooth Low Energy baseband links in Bluetooth Core Specifications 4.0 through 5.2 may permit an adjacent device to inject a crafted packet during the receive window of the listening device before the transmitting device initiates its packet transmission to achieve full MITM status without terminating the link. When applied against devices establishing or using encrypted links, crafted packets may be used to terminate an existing link, but will not compromise the confidentiality or integrity of the link.

NVD Source

Technical Analysis

CVE-2021-31615 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.3.