研究人員發現Microsoft Excel存在使用釋放後記憶體(Use After Free)漏洞(CVE-2026-62870)，未經身分鑑別之遠端攻擊者可利用此漏洞執行任意程式碼，請儘速確認並進行修補。

影響平台

Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Excel 2016 (32-bit edition) 16.0.5561.1001(不含)以前版本
Microsoft Excel 2016 (64-bit edition) 16.0.5561.1001(不含)以前版本
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft Office LTSC 2021 for 64-bit editions
Microsoft Office LTSC 2024 for 32-bit editions
Microsoft Office LTSC 2024 for 64-bit editions

處置建議

官方已針對漏洞釋出修補程式，請參考官方說明進行修補，網址如下：
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62870

參考資料

1. https://nvd.nist.gov/vuln/detail/CVE-2026-62870
2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62870