CVE:CVE-2021-21555
CNNVD:CNNVD-202106-1235
Dell PowerEdge Server BIOS是戴尔（Dell）的一款系统更新驱动程序。
Dell PowerEdge 存在安全漏洞，攻击者可利用该漏洞导致拒绝服务、任意代码执行或在UEFI或BIOS预引导环境中泄露信息。以下产品及版本受到影响：Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server。
solution:Upgrade dell poweredge_r640_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_r740_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_r740xd_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_r940_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_r840_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_r940xa_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_t640_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_mx740c_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2); Upgrade dell poweredge_mx840c_firmware to a higher version than 2.11.2,and avoid the version (,2.11.2)