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CVE-2022-26143

9.8, critical Known exploited

MiCollab, MiVoice Business Express Access Control Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
87% higher than 99.7% of scored CVEs
Exploitation
Confirmed in the wild
Published
10 Mar 20224 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 25 Mar 2022. US federal agencies had to remediate by 15 Apr 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

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.

Details

Vendor
Mitel
Product
Micollab
Weakness
CWE-306 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

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

References 8

Exploit code 1

Advisories 6

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Mitel CVEs

Every Mitel CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2024-55550 Mitel MiCollab Path Traversal Vulnerability KEV EPSS 38% 2.7, low
  • CVE-2024-41713 Mitel MiCollab Path Traversal Vulnerability KEV EPSS 97% 9.1, critical
  • CVE-2024-41710 Mitel SIP Phones Argument Injection Vulnerability KEV EPSS 42% 7.2, high
  • CVE-2022-40765 Mitel MiVoice Connect Command Injection Vulnerability KEV EPSS 11% 6.8, medium
  • CVE-2022-41223 Mitel MiVoice Connect Code Injection Vulnerability KEV EPSS 11% 6.8, medium
  • CVE-2022-29499 Mitel MiVoice Connect Data Validation Vulnerability KEV EPSS 55% 9.8, critical

Beyond this page

Is CVE-2022-26143 in your network?

This page tells you how dangerous CVE-2022-26143 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2022-26143 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2022-26143 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.