Page generated: 08 Nov 2026, 11:59 UTC
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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 …

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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) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.9/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 87.33%: +0.44

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 9 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Hong Kong Computer Emergency Response Team Coordination Centre
Press · 24 Jul 2026, 07:00 · Multiple Vulnerabilities in Internet-Facing Systems Targeting Hong Kong’s Education Sector - Hong Kong Computer Emergency Response Team Coordination Centre
Adgully.com
Press · 23 Aug 2023, 07:00 · Securing against escalating cyber threats: Q&A with Omer Yoachimik of Cloudflare - Adgully.com
The Record from Recorded Future News
Press · 19 Jul 2023, 07:00 · Cloudflare reports surge in sophisticated DDoS attacks - The Record from Recorded Future News
BleepingComputer
Press · 26 Mar 2022, 07:00 · CISA adds 66 vulnerabilities to list of bugs exploited in attacks - BleepingComputer
The Register
Press · 10 Mar 2022, 08:00 · Mitel VoIP systems used in staggering DDoS attacks - The Register
See all 9 source documents
The Hacker News
Press · 09 Mar 2022, 08:00 · Hackers Abuse Mitel Devices to Amplify DDoS Attacks by 4 Billion Times - The Hacker News
Akamai
Press · 08 Mar 2022, 08:00 · Akamai Blog | CVE-2022-26143: TP240PhoneHome Reflection/Amplification DDoS Attack Vector - Akamai
BleepingComputer
Press · 08 Mar 2022, 08:00 · DDoS attacks now use new record-breaking amplification vector - BleepingComputer
Cloudflare Blog
Press · 08 Mar 2022, 08:00 · CVE-2022-26143: A Zero-Day vulnerability for launching UDP amplification DDoS attacks - Cloudflare Blog

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.9 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 87.3%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:37.150188+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
08 Mar 2022, 08:00
Published
09 Mar 2022, 15:32
Added to the CISA KEV catalog
25 Mar 2022, 00:00
Latest press mention
24 Jul 2026, 07:00
Score calculated
05 Nov 2026, 13:58