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CVE-2021-3176

HIGH
8
CVSS Score
Published: January 29, 2021 at 06:29 AM UTC
Updated: June 17, 2026 at 04:04 AM UTC
1 product affected across 1 vendorBusinesscti Enterprise

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Severity
HIGH8
Exploit prediction
EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Businesscti Enterprise· Mitel
95%
v < 6.4.157.0 ≤ v < 7.1.2
Affected range stops below 6.4.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mitel.com/support/security-advisories
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-21-0001

CVSS

8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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