CVE-2019-1965

CVE-2019-1965 is a denial-of-service vulnerability in the Virtual Shell (VSH) session management of Cisco NX-OS Software. It allows an authenticated, remote attacker to cause VSH processes to accumulate, eventually depleting system memory and leading to unexpected behavior or crashes. The vulnerability has a CVSS score of 7.7 (HIGH), indicating a network-based attack with low complexity, requiring valid user credentials, and resulting in a high impact on availability. There is no evidence of active exploitation, nor is public exploit code available, though it has received some community and media attention.