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.
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
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=30614073Issue 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-vectorMitigation, Third Party Advisory
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001Vendor 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=30614073Issue 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-vectorMitigation, Third Party Advisory
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001Vendor 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-2022-26143US Government Resource
Timeline
- Published
- Mar 10, 2022
- Last modified
- Jun 17, 2026
- Added to CISA KEV
- Mar 25, 2022
- NVD status
- Analyzed