CVE:CVE-2021-34780
CNNVD:CNNVD-202110-306
Cisco Small Business 220 Series Smart Switches是美国思科（Cisco）公司的一款小型智能交换机设备。
Cisco Small Business 220 Series Smart Switches存在缓冲区错误漏洞，攻击者可利用该漏洞在受影响的设备上执行代码或导致代码意外重新加载在受影响的设备上导致LLDP数据库损坏。注：LLDP是第2层协议。要利用这些漏洞进行攻击，攻击者必须与受影响设备位于同一广播域中（第2层相邻）
solution:Upgrade cisco business_220-8t-e-2g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-8p-e-2g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-8fp-e-2g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-16t-2g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-16p-2g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-24t-4g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-24p-4g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-24fp-4g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-48t-4g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-48p-4g_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-24t-4x_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-24p-4x_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-24fp-4x_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-48t-4x_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-48p-4x_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]; Upgrade cisco business_220-48fp-4x_firmware to a higher version than 1.2.0.6,and avoid the version (,1.2.0.6]