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    CVE-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 the wild in February and March 2022 for the TP240PhoneHome DDoS attack.

    Published:Mar 9, 2022
    Last Modified:Nov 3, 2025
    EPS:Mar 9, 2022
    EPSS Score:0.75578
    CVSS Score:9.8

    CISA Notification

    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.

    Required Action:

    Apply updates per vendor instructions.

    Notes:

    No extra notes provided.

    Due Date
    Apr 15, 2022
    1610 days ago
    Alert Date
    Mar 25, 2022
    1631 days ago

    Affected Products

    Vendor
    Mitel
    Product
    Micollab
    Vendor
    Mitel
    Product
    Mivoice Business Express

    Exploits

    https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/

    Related CVEs

    CVE-2025-52914 (CVSS 8.8) — A vulnerability in the Suite Applications Services component of Mitel MiCollab 10.0 through SP1 FP1 (10.0.1.10…
    CVE-2025-52913 (CVSS 9.8) — A vulnerability in the NuPoint Unified Messaging (NPM) component of Mitel MiCollab through 9.8 SP2 (9.8.2.12) …
    CVE-2024-55550 (CVSS 2.7) — Mitel MiCollab through 9.8 SP2 could allow an authenticated attacker with administrative privilege to conduct …
    CVE-2024-30158 (CVSS 7.2) — A vulnerability in the web conferencing component of Mitel MiCollab through 9.7.1.110 could allow an authentic…
    CVE-2024-35286 (CVSS 9.8) — A vulnerability in NuPoint Messenger (NPM) of Mitel MiCollab through 9.8.0.33 allows an unauthenticated attack…
    CVE-2024-30157 (CVSS 7.2) — A vulnerability in the Suite Applications Services component of Mitel MiCollab through 9.7.1.110 could allow a…
    CVE-2024-35314 (CVSS 9.8) — A vulnerability in the Desktop Client of Mitel MiCollab through 9.7.1.110, and MiVoice Business Solution Virtu…
    CVE-2024-47223 (CVSS 9.4) — A vulnerability in the AWV (Audio, Web and Video Conferencing) component of Mitel MiCollab through 9.8 SP1 FP2…
    CVE-2024-47912 (CVSS 8.2) — A vulnerability in the AWV (Audio, Web, and Video) Conferencing component of Mitel MiCollab through 9.8 SP1 FP…
    CVE-2024-41712 (CVSS 6.6) — A vulnerability in the Web Conferencing Component of Mitel MiCollab through 9.8.1.5 could allow an authenticat…

    References

    https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/
    https://blog.cloudflare.com/cve-2022-26143/
    https://news.ycombinator.com/item?id=30614073
    https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/
    https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
    https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001
    https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
    https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/
    https://blog.cloudflare.com/cve-2022-26143/
    https://news.ycombinator.com/item?id=30614073
    https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/
    https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
    https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001
    https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26143

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High