Is CVE-2022-26143 actively exploited?

CVE-2022-26143 has no public evidence of in-the-wild exploitation as of 2025-11-03.

What is the CVSS score for CVE-2022-26143?

CVE-2022-26143 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2022-26143?

Patch guidance is available from mitel security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2022-26143.

Fix CVE-2022-26143 - CRITICAL mitel micollab

Q: Which products are affected by CVE-2022-26143?

4 products: mitel micollab, mitel micollab, mitel micollab, mitel mivoice business express.

Description

The TP-240 (aka tp240dvr) component in Mitel MiCollab before 9.4 SP1 FP1 and MiVoice Business Express through 8.1 allows remote attackers to obtain sensitive information and cause a denial of service (performance degradation and excessive outbound traffic). This was exploited in the wild in February and March 2022 for the TP240PhoneHome DDoS attack.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-306 · Missing Authentication CWE-306 · Missing Authentication

Metadata

Primary Vendor: MITEL
Published: 3/10/2022
Last Modified: 11/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mitel : micollabmitel : micollabmitel : micollabmitel : mivoice_business_express

Remediation Guidance

Executive Summary

View on NIST NVD