CVE:CVE-2020-9991
CNNVD:CNNVD-202011-1335
Apple iCloud for Windows是美国苹果（Apple）公司的一款基于Windows平台的云服务。该产品支持存储音乐、照片、App和联系人等。
Apple iCloud for Windows 7.21版本存在安全漏洞，攻击者可利用该漏洞导致拒绝服务。
solution:Upgrade apple icloud to a higher version than 7.21,11.4,and avoid the version (,7.21),[11.0,11.4); Upgrade apple ipados to a higher version than 14.0,and avoid the version (,14.0); Upgrade apple iphone_os to a higher version than 14.0,and avoid the version (,14.0); Upgrade apple mac_os_x to a higher version than 11.0.1,and avoid the version (,11.0.1); Upgrade apple tvos to a higher version than 14.0,and avoid the version (,14.0); Upgrade apple watchos to a higher version than 7.0,and avoid the version (,7.0)