CVE:CVE-2021-1619
CNNVD:CNNVD-202109-1562
Cisco IOS是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。
Cisco IOS XE Software 存在缓冲区错误漏洞，该漏洞源于变量未初始化造成的。攻击者可利用该漏洞向受影响的设备发送一系列NETCONF或RESTCONF请求来安装、操作或删除网络设备的配置，或损坏设备上的内存。
solution:Upgrade cisco ios_xe to a higher version than 16.3.1,16.3.1a,16.3.2,16.3.3,16.3.4,16.3.5,16.3.5b,16.3.6,16.3.7,16.3.8,16.3.9,16.3.10,16.3.11,16.4.1,16.4.2,16.4.3,16.5.1,16.5.1a,16.5.1b,16.5.2,16.5.3,16.6.1,16.6.2,16.6.3,16.6.4,16.6.4a,16.6.4s,16.6.5,16.6.5a,16.6.5b,16.6.6,16.6.7,16.6.7a,16.6.8,16.6.9,16.7.1,16.7.1a,16.7.1b,16.7.2,16.7.3,16.7.4,16.8.1,16.8.1a,16.8.1b,16.8.1c,16.8.1d,16.8.1e,16.8.1s,16.8.2,16.8.3,16.9.1,16.9.1a,16.9.1b,16.9.1c,16.9.1d,16.9.1s,16.9.2,16.9.2a,16.9.2s,16.9.3,16.9.3a,16.9.3h,16.9.3s,16.9.4,16.9.4c,16.9.5,16.9.5f,16.9.6,16.9.7,16.10.1,16.10.1a,16.10.1b,16.10.1c,16.10.1d,16.10.1e,16.10.1f,16.10.1g,16.10.1s,16.10.2,16.10.3,16.11.1,16.11.1a,16.11.1b,16.11.1c,16.11.1s,16.11.2,16.12.1,16.12.1a,16.12.1c,16.12.1s,16.12.1t,16.12.1w,16.12.1x,16.12.1y,16.12.1z,16.12.1z1,16.12.1za,16.12.2,16.12.2a,16.12.2s,16.12.2t,16.12.3,16.12.3a,16.12.3s,16.12.4,16.12.4a,16.12.5,16.12.5a,16.12.5b,17.1.1,17.1.1a,17.1.1s,17.1.1t,17.1.2,17.1.3,17.2.1,17.2.1a,17.2.1r,17.2.1v,and avoid the version 16.3.1,16.3.1a,16.3.2,16.3.3,16.3.4,16.3.5,16.3.5b,16.3.6,16.3.7,16.3.8,16.3.9,16.3.10,16.3.11,16.4.1,16.4.2,16.4.3,16.5.1,16.5.1a,16.5.1b,16.5.2,16.5.3,16.6.1,16.6.2,16.6.3,16.6.4,16.6.4a,16.6.4s,16.6.5,16.6.5a,16.6.5b,16.6.6,16.6.7,16.6.7a,16.6.8,16.6.9,16.7.1,16.7.1a,16.7.1b,16.7.2,16.7.3,16.7.4,16.8.1,16.8.1a,16.8.1b,16.8.1c,16.8.1d,16.8.1e,16.8.1s,16.8.2,16.8.3,16.9.1,16.9.1a,16.9.1b,16.9.1c,16.9.1d,16.9.1s,16.9.2,16.9.2a,16.9.2s,16.9.3,16.9.3a,16.9.3h,16.9.3s,16.9.4,16.9.4c,16.9.5,16.9.5f,16.9.6,16.9.7,16.10.1,16.10.1a,16.10.1b,16.10.1c,16.10.1d,16.10.1e,16.10.1f,16.10.1g,16.10.1s,16.10.2,16.10.3,16.11.1,16.11.1a,16.11.1b,16.11.1c,16.11.1s,16.11.2,16.12.1,16.12.1a,16.12.1c,16.12.1s,16.12.1t,16.12.1w,16.12.1x,16.12.1y,16.12.1z,16.12.1z1,16.12.1za,16.12.2,16.12.2a,16.12.2s,16.12.2t,16.12.3,16.12.3a,16.12.3s,16.12.4,16.12.4a,16.12.5,16.12.5a,16.12.5b,17.1.1,17.1.1a,17.1.1s,17.1.1t,17.1.2,17.1.3,17.2.1,17.2.1a,17.2.1r,17.2.1v; Upgrade cisco ios_xe_sd-wan to a higher version than *; Upgrade cisco ios_xe_sd-wan_16.10.1_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.1_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.1_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.1_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.2_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.2_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.2_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.2_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.3_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.3a_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3a_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3a_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3a_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.10.3a_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.3b_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3b_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3b_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.3b_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.10.3b_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.4_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.4_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.4_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.4_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.10.4_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.5_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.5_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.5_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.5_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.10.5_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.10.6_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.6_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.6_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.10.6_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.10.6_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.11.1_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.11.1a_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1a_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1a_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1a_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.11.1a_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.11.1b_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1b_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1b_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1b_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.11.1b_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.11.1d_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.11.1d_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.11.1f_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1s_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1s_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1s_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.11.1s_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.11.1s_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1a_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1a_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1a_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1a_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1a_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1a_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1b_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1b_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1b1_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b1_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b1_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b1_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1b1_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1b1_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1c_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1c_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1c_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1c_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1c_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1c_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1d_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1d_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1d_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1d_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1d_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1d_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.1e_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1e_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1e_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1e_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.1e_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.1e_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.2r_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.2r_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.2r_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.2r_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.2r_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.2r_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.3_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.3_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.3_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.3_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.3_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.3_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.4_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.4_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.4_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.4_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.4_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.4_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.4a_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.4a_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.4a_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.12.5_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.5_when_installed_on_1100_series_industrial_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.5_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.5_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.12.5_when_installed_on_cloud_services_router_1000v to a higher version than series,and avoid the version series; Upgrade cisco ios_xe_sd-wan_16.12.5_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.9.1_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.1_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.1_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.1_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.9.2_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.2_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.2_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.2_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.9.3_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.3_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.3_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.3_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router; Upgrade cisco ios_xe_sd-wan_16.9.4_when_installed_on_1000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.4_when_installed_on_4000_series_integrated_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.4_when_installed_on_asr_1000_series_aggregation_services to a higher version than routers,and avoid the version routers; Upgrade cisco ios_xe_sd-wan_16.9.4_when_installed_on_integrated_services_virtual to a higher version than router,and avoid the version router