8.1

CVE-2020-27639: mitel 6873i_sip_firmware

Modified
Published 18-12-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-27639 is a high (CVSS 8.1) vulnerability in mitel 6873i_sip_firmware. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 44.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.1, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (NVD)
EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 18-12-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.52% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Mitel3 products
  • 6873i_sip_firmware< 5.1.0 | 5.1.0 | 5.1.0:sp1 | 5.1.0:sp2 | 5.1.0:sp3 | 5.1.0:sp4 | 5.1.0:sp5
  • 6930_sip_firmware< 5.1.0 | 5.1.0 | 5.1.0:sp1 | 5.1.0:sp2 | 5.1.0:sp3 | 5.1.0:sp4 | 5.1.0:sp5
  • 6940_sip_firmware< 5.1.0 | 5.1.0 | 5.1.0:sp1 | 5.1.0:sp2 | 5.1.0:sp3 | 5.1.0:sp4 | 5.1.0:sp5

1 vendor · 3 products

References

1 links