CVE-2021-3176

HIGH 8.0CVE-2021-3176 · Published 29/01/2021 · updated 17/06/2026

In short

CVE-2021-3176 is a HIGH (CVSS 8.0) vulnerability affecting businesscti enterprise (mitel).
Chance of exploitation in the next 30 days (EPSS): 0.89%, higher than 59.3% of all vulnerabilities.
Fix: update to 7.1.2, 6.4.15 or later.

Package	Affected versions	Patched versions
businesscti enterprise mitel	`≥ 7.0, < 7.1.2< 6.4.15`	`7.1.26.4.15`

Description

The chat window of the Mitel BusinessCTI Enterprise (MBC-E) Client for Windows before 6.4.15 and 7.x before 7.1.2 could allow an attacker to gain access to user information by sending certain code, due to improper input validation of http links. A successful exploit could allow an attacker to view user information and application data.

References

mitel.com/support/security-advisories · Vendor Advisory
mitel.com/support/security-advisories/mitel-product-security-advisory-21-0001 · Vendor Advisory

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