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Vulnerabilities

Vulnerability · CVE-2022-26143

MiCollab, MiVoice Business Express Access Control Vulnerability

Published Mar 8, 2022 · catalog updated Jun 16, 2026 · Mitel MiCollab, MiVoice Business Express

Patch now

CVE-2022-26143 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm Mitel MiCollab, MiVoice Business Express against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
87.33%
Remediation
Remediation guidance
Affected products
cpe mitel/micollab · cpe mitel/mivoice business express · vendor Mitel MiCollab, MiVoice Business Express

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mitel/micollab9.4
  • cpe mitel/mivoice business expressversion unspecified
  • vendor Mitel MiCollab, MiVoice Business Expressversion unspecified

How to fix CVE-2022-26143

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2022-26143 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm Mitel MiCollab, MiVoice Business Express against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 9.4. Apply updates per vendor instructions.

What should an analyst verify?

CWE-306: Missing Authentication for Critical Function; CWE-406. EPSS 87.33%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 10, 2022 · Catalog

    Detected

    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.

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2022-26143

    A vulnerability has been identified in MiCollab and MiVoice Business Express that may allow a malicious actor to gain unauthorized access to sensitive information and services, cause performance degradations or a denial of service condition on the affected system.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2022-26143

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-26143

    30-day exploitation probability 87.3%

    first.org
  • NIST NVDVulnerability recordCVE-2022-26143

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2022-26143

    A vulnerability has been identified in MiCollab and MiVoice Business Express that may allow a malicious actor to gain unauthorized access to sensitive information and services, cause performance degradations or a denial of service condition on the affected system.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.