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Exploited vulnerability · CISA KEV

Is CVE-2022-26143 exploited? Yes: in CISA KEV since 25 Mar 2022

Gociux · Mitel MiCollab, MiVoice Business Express · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-26143, MiCollab, MiVoice Business Express Access Control Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Mar 2022, 16 days after it was published. It affects Mitel MiCollab, MiVoice Business Express. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due15 Apr 2022BOD 22-01 deadline

What it is

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.

VendorMitel (7 exploited CVEs in KEV)
ProductMiCollab, MiVoice Business Express
VulnerabilityMiCollab, MiVoice Business Express Access Control Vulnerability
WeaknessCWE-306, CWE-406
Published9 Mar 2022
Added to KEV25 Mar 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for MiCollab, MiVoice Business Express in your asset inventory, including appliances and cloud images. Stack check lists every exploited Mitel CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 9 Mar 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Mitel.

References

Questions

Is CVE-2022-26143 being exploited?

Yes. CISA added CVE-2022-26143 to the Known Exploited Vulnerabilities catalog on 25 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-26143 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2022-26143?

Apply updates per vendor instructions. Check Mitel's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected MiCollab, MiVoice Business Express and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Mitel scorecard · act-now radar.

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