Is CVE-2020-27639 actively exploited?

No active exploitation of CVE-2020-27639 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-27639 be exploited remotely?

Partially. CVE-2020-27639 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2020-27639?

CVE-2020-27639 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2020-27639

NVD-CWE-noinfoPublished: December 18, 2020· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

The Bluetooth handset of Mitel MiVoice 6873i, 6930, and 6940 SIP phones with firmware before 5.1.0.SP6 could allow an unauthenticated attacker within Bluetooth range to pair a rogue Bluetooth device when a phone handset loses connection, due to an improper pairing mechanism. A successful exploit could allow an attacker to eavesdrop on conversations.

NVD Source

Technical Analysis

CVE-2020-27639 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 complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 8.1.