【Security Vulnerability Warning】Microsoft Exchange Server exist security vulnerabilities (CVE-2021-28480~28483), please confirm and update as soon as possible!

Subject:【Security Vulnerability Warning】Microsoft Exchange Server exist security vulnerabilities (CVE-2021-28480~28483), 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://thehackernews.com/2021/04/nsa-discovers-new-vulnerabilities.html
2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28480
3. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28481
4. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28482
5. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28483
6. https://www.cybersecurity-help.cz/vdb/SB2021041327

Network System Division
Computer and Communication Center