CVE-2022-26143 on CISA KEV

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

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• www.mitel.com — https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-a…
• www.akamai.com — https://www.akamai.com/blog/security/phone-home-ddos-attack-vector
• www.shadowserver.org — https://www.shadowserver.org/news/cve-2022-26143-tp240phonehome-reflection-ampli…
• news.ycombinator.com — https://news.ycombinator.com/item?id=30614073
• blog.cloudflare.com — https://blog.cloudflare.com/cve-2022-26143/
• team-cymru.com — https://team-cymru.com/blog/2022/03/08/record-breaking-ddos-potential-discovered…
• arstechnica.com — https://arstechnica.com/information-technology/2022/03/ddosers-use-new-method-ca…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / n/a	n/a

06Detection

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