{"id":"CVE-2022-26143","published":"2022-03-10T17:47:32Z","modified":"2026-06-17T04:34:46Z","title":"MiCollab, MiVoice Business Express Access Control Vulnerability","vendor":"Mitel","product":"MiCollab, MiVoice Business Express","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"The TP-240 (tp240dvr) component in Mitel MiCollab (before 9.4 SP1 FP1) and MiVoice Business Express (through 8.1) lacks proper access control, exposing critical functionality without authentication. A remote attacker with network access and no credentials or user interaction can obtain sensitive information and degrade performance by generating excessive outbound traffic.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-30T13:36:00Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.87325,"percentile":0.99753,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2022-03-25","dueDate":"2022-04-15","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2022-26143","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-03-08","exploitedFirstSeen":"2022-03-08","ransomware":false,"evidence":[{"url":"https://blog.cloudflare.com/cve-2022-26143-amplification-attack/","date":"2022-03-08"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-26143","date":"2022-03-09"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-03-25"},{"url":"https://blog.cloudflare.com/ddos-threat-report-2023-q2/","date":"2023-07-18"},{"url":"https://www.hkcert.org/security-bulletin/multiple-vulnerabilities-in-internet-facing-systems-targeting-hong-kong-s-education-sector_20260724","date":"2026-07-24"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"},{"id":"CWE-406","name":"Insufficient Control of Network Message Volume (Network Amplification)"}],"references":[{"url":"https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/","tags":["Exploit","Press/Media Coverage","Third Party Advisory"]},{"url":"https://blog.cloudflare.com/cve-2022-26143/","tags":["Mitigation","Third Party Advisory"]},{"url":"https://news.ycombinator.com/item?id=30614073","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/","tags":["Broken Link","Mitigation","Third Party Advisory"]},{"url":"https://www.akamai.com/blog/security/phone-home-ddos-attack-vector","tags":["Mitigation","Third Party Advisory"]},{"url":"https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001","tags":["Vendor Advisory"]},{"url":"https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/","tags":["Mitigation","Third Party Advisory"]},{"url":"https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/","tags":["Exploit","Press/Media Coverage","Third Party Advisory"]},{"url":"https://blog.cloudflare.com/cve-2022-26143/","tags":["Mitigation","Third Party Advisory"]},{"url":"https://news.ycombinator.com/item?id=30614073","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/","tags":["Broken Link","Mitigation","Third Party Advisory"]},{"url":"https://www.akamai.com/blog/security/phone-home-ddos-attack-vector","tags":["Mitigation","Third Party Advisory"]},{"url":"https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001","tags":["Vendor Advisory"]},{"url":"https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/","tags":["Mitigation","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26143","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Remote unauthenticated attacker exploits exposed public-facing component","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows remote attackers to obtain sensitive information","start":114,"end":169}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1498","name":"Network Denial of Service","tactics":["impact"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Network amplification causes DoS and outbound traffic","mappingType":"primary_impact","evidence":[{"from":"description","quote":"cause a denial of service (performance degradation and excessive outbound traffic)","start":174,"end":256}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-30710","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-30710","exploited":true,"exploitedSince":"2022-03-25","provenance":"source"},"exploits":[],"exploitSources":{"nuclei":[{"id":"CVE-2022-26143","name":"Mitel MiCollab - Information Disclosure & Denial of Service","severity":"critical","path":"http/cves/2022/CVE-2022-26143.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2022/CVE-2022-26143.yaml"}],"provenance":"source"},"exploitRefs":["https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-by-a-factor-of-4-billion/"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1498"],"provenance":"ai"}],"timeline":[{"date":"2022-03-08","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://blog.cloudflare.com/cve-2022-26143-amplification-attack/","provenance":"source"},{"date":"2022-03-10","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26143","provenance":"source"},{"date":"2022-03-25","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-03-25","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-30710","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":15},"priority":{"score":69.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1697 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.95,"detail":"percentile 0.9975"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}