【Security Vulnerability Warning】Microsoft Exchange Server exist security vulnerabilities (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065). Please confirm and update as soon as possible !

Subject:【Security Vulnerability Warning】Microsoft Exchange Server exist security vulnerabilities (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065), allowing attackers to remotely execute arbitrary code. Please confirm and update as soon as possible !

Description:
For details, please refer to the following links.

1. https://www.ithome.com.tw/news/143001
2. https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
3. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26855
4. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26857
5. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26858
6. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27065

Network System Division
Computer and Communication Center