CVE-2022-26143The 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…
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It affects mitel micollab and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 25, 2022; federal agencies had to remediate by Apr 15, 2022. Treat that date as your deadline.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-306
- Known exploited
- Added to CISA KEV Mar 25, 2022; federal remediation due Apr 15, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 87.33% (percentile 100)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mitel micollab mitel:micollab | before 9.4; 9.4; 9.4 | NVD |
mitel mivoice_business_express mitel:mivoice_business_express | through 8.1 | NVD |
References
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001x-refsource-misc, vendor-advisory
- https://www.akamai.com/blog/security/phone-home-ddos-attack-vectorx-refsource-misc, mitigation, third-party-advisory
- https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/x-refsource-misc, mitigation, third-party-advisory
- https://news.ycombinator.com/item?id=30614073x-refsource-misc, issue-tracking, third-party-advisory
- https://blog.cloudflare.com/cve-2022-26143/x-refsource-misc, mitigation, third-party-advisory
- https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/x-refsource-misc, broken-link, 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/x-refsource-misc, exploit, press/media-coverage, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26143us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.