IOS to XE mapping and IOS XE trains merging -looking for more info
Differences between IOS and IOS XE – nocsma
There is a zero-day vulnerability in Cisco's network equipment OS 'Cisco IOS XE' that can gain complete control of the device, attacks have already been confirmed - GIGAZINE
Cisco IOS XEとCisco IOSの違い - インフラエンジニアのメモ帳
Failles zero-day dans Cisco IOS XE : le correctif est là !