Date：2021/03/09

【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.

https://www.ithome.com.tw/news/143001

https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26855

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26857

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26858

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27065

Network System Division
Computer and Communication Center