{
    "id": "CVE-2022-26143",
    "published": "2022-03-10 17:47:32",
    "last_modified": "2026-06-17 04:34:46",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "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.",
    "epss_score": "0.87325",
    "epss_percentile": "0.99750",
    "kev": 1,
    "kev_due": "2022-04-15",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:29:09",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-04-15."
    },
    "products": [
        {
            "vendor": "mitel",
            "product": "micollab"
        },
        {
            "vendor": "mitel",
            "product": "mivoice_business_express"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2022-26143",
        "date_added": "2022-03-25",
        "due_date": "2022-04-15",
        "vendor": "Mitel",
        "product": "MiCollab, MiVoice Business Express",
        "name": "MiCollab, MiVoice Business Express Access Control Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "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"
    ]
}