Mitel has warned customers to updated their software to patch vulnerabilities.

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Mitel has deployed patches for several vulnerabilities in its software. Researches had found that 20,000 users are at risk due to the vulnerabilities. CISA has warned that these vulnerabilities have been exploited in the wild.

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https://www.securityweek.com/critical-vulnerability-exposes-many-mitel-micollab-instances-to-remote-hacking/