Team ENVY, a Security Research TEAM has found a flaw that allows for a remote code execution on the NVR. The seed string for the encrypt key was hardcoding. The manufacturer has released patch firmware for the flaw, please refer to the manufacturer's report for details and workarounds.
Exploitability
AV:LAC:HAT:NPR:HUI:NVulnerable System
VC:NVI:HVA:NSubsequent System
SC:NSI:NSA:N5.6/CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NOther