Cisco has released security update to address vulnerabilities in earlier version of IOS XR Software Release 5.3.4 for the Cisco Aggregation Services Router (ASR) 9000 Series. If left unpatched, attackers could exploit them and gain complete control of the system.
Therefore, BtCIRT recommends users and administrators to review Cisco Security Advisory for more details and apply the necessary updates.
Patch and be Protected.