CVE-2022-26143

9.8 CRITICAL CISA KEV - Actively Exploited
Published: March 10, 2022 Modified: November 03, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/
Source: cve@mitre.org
Exploit Press/Media Coverage Third Party Advisory
https://blog.cloudflare.com/cve-2022-26143/
Source: cve@mitre.org
Mitigation Third Party Advisory
https://news.ycombinator.com/item?id=30614073
Source: cve@mitre.org
Issue Tracking Third Party Advisory
https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/
Source: cve@mitre.org
Broken Link Mitigation Third Party Advisory
https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
Source: cve@mitre.org
Mitigation Third Party Advisory
https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001
Source: cve@mitre.org
Vendor Advisory
https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
Source: cve@mitre.org
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/
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Press/Media Coverage Third Party Advisory
https://blog.cloudflare.com/cve-2022-26143/
Source: af854a3a-2127-422b-91ae-364da2661108
Mitigation Third Party Advisory
https://news.ycombinator.com/item?id=30614073
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Third Party Advisory
https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Mitigation Third Party Advisory
https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
Source: af854a3a-2127-422b-91ae-364da2661108
Mitigation Third Party Advisory
https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
Source: af854a3a-2127-422b-91ae-364da2661108
Mitigation Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26143
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

15 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
89.2%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-04-15

Weaknesses (CWE)

CWE-306 CWE-306

Affected Vendors

mitel

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