Cisco Security Advisory Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service Vulnerability High Advisory ID: cisco-sa-20190501-phone-sip-xml-dos First Published: 2019 May 1 16:00 GMT Version 1.0: Final Workarounds: No workarounds available. Cisco has released free software updates that address the vulnerability described in this advisory. The fix for Cisco Unified IP 8831 Conference Phone is targeted for late 2019.”]