This issue occurs when the following conditions are true:
- You run a Cisco AnyConnect Secure Mobility Client application to establish virtual private network (VPN) connections in Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2.
- You have installed update 3023607 on the computer. For more information about update 3023607, see the Secure Channel cumulative update changes TLS protocol renegotiation and fallback behavior.