CVE-2022-26143

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 87%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
87%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

March 10, 2022

Last Modified

November 3, 2025

Advisory Details (5)

Auto-updated Sep 17, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

TP240PhoneHome Reflection/Amplification DDoS Attack Vector | Hacker News

https://news.ycombinator.com/item?id=30614073
generic🔴 Active Exploitation

CVE-2022-26143: TP240PhoneHome reflection/amplification DDoS attack vector | Cloudflare Blog

https://blog.cloudflare.com/cve-2022-26143/
generic

New method that amplifies DDoSes by 4 billion-fold. What could go wrong? - Ars Technica

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

CVE-2022-26143: TP240PhoneHome Reflection/Amplification DDoS Attack Vector | The Shadowserver Foundation

https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
generic

Mitel Product Security Advisory 22-0001 | Mitel

https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 47× in last 7d / 203× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 741 total refreshes for this CVE.

  1. 2026-09-19 21:58 UTCGHSA enrichment
  2. 2026-09-19 17:34 UTCGHSA enrichment
  3. 2026-09-19 13:10 UTCGHSA enrichment
  4. 2026-09-19 08:46 UTCGHSA enrichment
  5. 2026-09-19 04:21 UTCGHSA enrichment
  6. 2026-09-18 23:57 UTCGHSA enrichment
  7. 2026-09-18 19:33 UTCEG score recompute
  8. 2026-09-18 19:33 UTCGHSA enrichment
  9. 2026-09-18 19:20 UTCCISA KEV update
  10. 2026-09-18 15:09 UTCGHSA enrichment
  11. 2026-09-18 14:15 UTCCISA KEV update
  12. 2026-09-18 10:46 UTCGHSA enrichment
  13. 2026-09-18 06:21 UTCGHSA enrichment
  14. 2026-09-18 01:57 UTCGHSA enrichment
  15. 2026-09-17 21:33 UTCEG score recompute
  16. 2026-09-17 21:33 UTCGHSA enrichment
  17. 2026-09-17 19:23 UTCEPSS rescore
  18. 2026-09-17 17:08 UTCGHSA enrichment
  19. 2026-09-17 12:14 UTCGHSA enrichment
  20. 2026-09-17 07:50 UTCGHSA enrichment
  21. 2026-09-17 03:26 UTCGHSA enrichment
  22. 2026-09-16 23:02 UTCGHSA enrichment
  23. 2026-09-16 18:38 UTCGHSA enrichment
  24. 2026-09-16 14:14 UTCGHSA enrichment
  25. 2026-09-16 14:10 UTCCISA KEV update
Show 75 more
  1. 2026-09-16 09:49 UTCGHSA enrichment
  2. 2026-09-16 05:25 UTCGHSA enrichment
  3. 2026-09-16 01:01 UTCGHSA enrichment
  4. 2026-09-15 20:37 UTCGHSA enrichment
  5. 2026-09-15 16:07 UTCGHSA enrichment
  6. 2026-09-15 11:43 UTCGHSA enrichment
  7. 2026-09-15 07:19 UTCGHSA enrichment
  8. 2026-09-15 02:55 UTCGHSA enrichment
  9. 2026-09-14 22:31 UTCGHSA enrichment
  10. 2026-09-14 19:24 UTCCISA KEV update
  11. 2026-09-14 18:07 UTCGHSA enrichment
  12. 2026-09-14 13:43 UTCGHSA enrichment
  13. 2026-09-14 09:19 UTCGHSA enrichment
  14. 2026-09-14 04:55 UTCGHSA enrichment
  15. 2026-09-14 00:31 UTCGHSA enrichment
  16. 2026-09-13 20:07 UTCEG score recompute
  17. 2026-09-13 20:07 UTCGHSA enrichment
  18. 2026-09-13 16:43 UTCEPSS rescore
  19. 2026-09-13 15:43 UTCGHSA enrichment
  20. 2026-09-13 11:19 UTCGHSA enrichment
  21. 2026-09-13 06:55 UTCGHSA enrichment
  22. 2026-09-13 02:31 UTCGHSA enrichment
  23. 2026-09-12 22:07 UTCGHSA enrichment
  24. 2026-09-12 17:43 UTCGHSA enrichment
  25. 2026-09-12 13:19 UTCGHSA enrichment
  26. 2026-09-12 08:55 UTCGHSA enrichment
  27. 2026-09-12 04:30 UTCGHSA enrichment
  28. 2026-09-12 00:06 UTCGHSA enrichment
  29. 2026-09-11 19:42 UTCGHSA enrichment
  30. 2026-09-11 18:49 UTCCISA KEV update
  31. 2026-09-11 15:18 UTCGHSA enrichment
  32. 2026-09-11 10:54 UTCGHSA enrichment
  33. 2026-09-11 06:30 UTCGHSA enrichment
  34. 2026-09-11 02:06 UTCGHSA enrichment
  35. 2026-09-10 21:42 UTCGHSA enrichment
  36. 2026-09-10 19:28 UTCCISA KEV update
  37. 2026-09-10 17:18 UTCGHSA enrichment
  38. 2026-09-10 12:52 UTCEG score recompute
  39. 2026-09-10 12:52 UTCGHSA enrichment
  40. 2026-09-10 08:28 UTCGHSA enrichment
  41. 2026-09-10 04:01 UTCGHSA enrichment
  42. 2026-09-09 23:37 UTCGHSA enrichment
  43. 2026-09-09 19:13 UTCGHSA enrichment
  44. 2026-09-09 19:08 UTCCISA KEV update
  45. 2026-09-09 14:49 UTCGHSA enrichment
  46. 2026-09-09 10:25 UTCGHSA enrichment
  47. 2026-09-09 06:01 UTCGHSA enrichment
  48. 2026-09-09 01:38 UTCGHSA enrichment
  49. 2026-09-08 21:13 UTCGHSA enrichment
  50. 2026-09-08 18:54 UTCCISA KEV update
  51. 2026-09-08 16:48 UTCGHSA enrichment
  52. 2026-09-08 12:22 UTCGHSA enrichment
  53. 2026-09-08 07:56 UTCGHSA enrichment
  54. 2026-09-08 03:32 UTCGHSA enrichment
  55. 2026-09-07 23:08 UTCGHSA enrichment
  56. 2026-09-07 18:44 UTCGHSA enrichment
  57. 2026-09-07 14:20 UTCGHSA enrichment
  58. 2026-09-07 09:53 UTCGHSA enrichment
  59. 2026-09-07 05:26 UTCGHSA enrichment
  60. 2026-09-07 01:00 UTCGHSA enrichment
  61. 2026-09-06 20:36 UTCGHSA enrichment
  62. 2026-09-06 16:11 UTCEG score recompute
  63. 2026-09-06 16:11 UTCGHSA enrichment
  64. 2026-09-06 13:45 UTCEPSS rescore
  65. 2026-09-06 11:45 UTCGHSA enrichment
  66. 2026-09-06 07:21 UTCGHSA enrichment
  67. 2026-09-06 02:57 UTCGHSA enrichment
  68. 2026-09-05 22:32 UTCGHSA enrichment
  69. 2026-09-05 18:07 UTCEG score recompute
  70. 2026-09-05 18:06 UTCGHSA enrichment
  71. 2026-09-05 15:25 UTCEPSS rescore
  72. 2026-09-05 13:40 UTCGHSA enrichment
  73. 2026-09-05 09:17 UTCGHSA enrichment
  74. 2026-09-05 04:53 UTCGHSA enrichment
  75. 2026-09-05 00:28 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2022/CVE-2022-26143.yaml
    First seen Jan 1, 2022

    Mitel MiCollab - Information Disclosure & Denial of Service

    Open source ↗

Frequently asked(6)

What is CVE-2022-26143?
CVE-2022-26143 is a critical vulnerability published on March 10, 2022. 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…
When was CVE-2022-26143 disclosed?
CVE-2022-26143 was first published in the National Vulnerability Database on March 10, 2022, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-26143 actively exploited?
Yes. CISA added CVE-2022-26143 to the Known Exploited Vulnerabilities catalog on March 25, 2022, affecting Mitel MiCollab, MiVoice Business Express. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2022-26143?
CVE-2022-26143 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2022-26143?
CVE-2022-26143 affects Mitel MiCollab, MiVoice Business Express. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2022-26143?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-26143, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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