CVE-2020-27154

Name: CVE-2020-27154
Creator: NVD / NIST
Published: 2020-12-18T08:15:14.81+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.02%

Last modified Jun 17, 2026

CVE-2020-27154 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The chat window of Mitel BusinessCTI Enterprise (MBC-E) Client for Windows before 6.4.11 and 7.x before 7.0.3 could allow an attacker to gain access to user information by sending arbitrary code, due to improper input validation. A successful exploit could allow an attacker to view the user information and application data.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

Description

The chat window of Mitel BusinessCTI Enterprise (MBC-E) Client for Windows before 6.4.11 and 7.x before 7.0.3 could allow an attacker to gain access to user information by sending arbitrary code, due to improper input validation. A successful exploit could allow an attacker to view the user information and application data.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.02%

59.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mitel	Businesscti Enterprise	< 6.4.11
Mitel	Businesscti Enterprise	>= 7.0.0, < 7.0.3

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-2020-27154?

How severe is CVE-2020-27154?

CVE-2020-27154 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27154?

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-2020-27154?

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

Scan your code now

Source: NVD / NIST