CVEvulnerability
CVE-2022-26143
CISA Known Exploited Vulnerability
MiCollab, MiVoice Business Express Access Control Vulnerability — Mitel MiCollab, MiVoice Business Express
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.
- Added to KEV
- 2022-03-25
- Remediation due
- 2022-04-15
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Notes
- https://nvd.nist.gov/vuln/detail/CVE-2022-26143
- Status
- Analyzed
- Published
- 2022-03-10
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 9.0 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:C
- Weaknesses
- CWE-306
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.
Affected configurations
• mitel micollab (< 9.4)
• mitel micollab 9.4
• mitel mivoice business express (<= 8.1)
Related
Weakness · CWE (1)
- CWE-306 Missing Authentication for Critical Functionality weakness
References
- https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/ Exploit, Press/Media Coverage, Third Party Advisory
- https://blog.cloudflare.com/cve-2022-26143/ Mitigation, Third Party Advisory
- https://news.ycombinator.com/item?id=30614073 Issue Tracking, Third Party Advisory
- https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/ Broken Link, Mitigation, Third Party Advisory
- https://www.akamai.com/blog/security/phone-home-ddos-attack-vector Mitigation, Third Party Advisory
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001 Vendor Advisory
- https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/ Mitigation, Third Party Advisory
- https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/ Exploit, Press/Media Coverage, Third Party Advisory
- https://blog.cloudflare.com/cve-2022-26143/ Mitigation, Third Party Advisory
- https://news.ycombinator.com/item?id=30614073 Issue Tracking, Third Party Advisory
- https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/ Broken Link, Mitigation, Third Party Advisory
- https://www.akamai.com/blog/security/phone-home-ddos-attack-vector Mitigation, Third Party Advisory
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001 Vendor Advisory
- https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/ Mitigation, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26143 US Government Resource