說明：

研究人員發現Microsoft Exchange Server因輸入驗證不正確而導致存在安全漏洞(CVE-2021-28480~28483)，遠程攻擊者可藉由發送特製請求，利用此漏洞進而執行任意代碼。

影響平台:

Microsoft Exchange Server 2013 

Microsoft Exchange Server 2016 

Microsoft Exchange Server 2019

建議措施:

目前微軟官方已針對此漏洞釋出更新程式，請各機關聯絡設備維護廠商或參考以下網址進行更新：

1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28480

2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28481

3. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28482

4. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28483

參考資料

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