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CVE-2022-26143MiCollab, MiVoice Business Express Access Control Vulnerability
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.
9.8 CRITICALEPSS 87.32%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 9.0 | HIGH | 2.0NVD | AV:N/AC:L/Au:N/C:P/I:P/A:C |
CISA required action
⚡ Known exploited · remediation due Apr 15, 2022
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2022-26143
- Status
- Analyzed
- Assigner (CNA)
- mitre
- Published
- Mar 10, 2022
- Last modified
- 2026-06-17 04:34 UTC
Affected Products
From NVD CPE configurations.
mitelmicollab3 version ranges
- before 9.4
- 9.4
- 9.4 sp1
mitelmivoice business express1 version range
- through 8.1
References
- arstechnica.com https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/
- blog.cloudflare.com https://blog.cloudflare.com/cve-2022-26143/
- news.ycombinator.com https://news.ycombinator.com/item?id=30614073
- team-cymru.com https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/
- akamai.com https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
- mitel.com https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001
- shadowserver.org https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26143