Mitel · MiCollab, MiVoice Business Express
CVE-2022-26143
MiCollab, MiVoice Business Express Access Control Vulnerability
What it is
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.
CISA: A vulnerability has been identified in MiCollab and MiVoice Business Express that may allow a malicious actor to gain unauthorized access to sensitive information and services, cause performance degradations or a denial of service condition on the affected system.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: April 15, 2022
- Added to the CISA list
- March 25, 2022
- Published
- March 9, 2022
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 87% in the top 0.2% of all known vulnerabilities
- Weakness
- CWE-306 CWE-406
- More details
- NVD · CVE.org · CISA
All references (7)
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-22-0001
- https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
- https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-amplification-ddos-attack-vector/
- https://news.ycombinator.com/item?id=30614073
- https://blog.cloudflare.com/cve-2022-26143/
- https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered-cve-2022-26143/
- https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-capable-of-amplifying-traffic-b…
More exploited flaws from Mitel
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Feb 12, 2025 | Argument Injection | SIP Phones | Medium 6.8 | 42% |
| Jan 7, 2025 | Path Traversal | MiCollab | Critical 9.1 | 97% |
| Jan 7, 2025 | Path Traversal | MiCollab | Medium 4.4 | 38% |
| Feb 21, 2023 | Command Injection | MiVoice Connect | Medium 6.8 | 11% |
| Feb 21, 2023 | Code Injection | MiVoice Connect | Medium 6.8 | 11% |
| Jun 27, 2022 | Data Validation | MiVoice Connect | Critical 9.8 | 55% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.