CVE-2020-27639

Name: CVE-2020-27639
Creator: NVD / NIST
Published: 2020-12-18T08:15:14.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2020-27639 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.51%

39.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mitel	6873i Sip Firmware	< 5.1.0
Mitel	6873i Sip Firmware	5.1.0
Mitel	6930 Sip Firmware	< 5.1.0
Mitel	6930 Sip Firmware	5.1.0
Mitel	6940 Sip Firmware	< 5.1.0
Mitel	6940 Sip Firmware	5.1.0

References

https://www.mitel.com/support/security-advisoriesVendor Advisory
https://www.mitel.com/support/security-advisoriesVendor Advisory

Timeline

Published: Dec 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27639?

How severe is CVE-2020-27639?

CVE-2020-27639 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27639?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27639?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST