The first S0 encryption key is generated with an uninitialized PRNG in Z/IP Gateway products running Silicon Labs Z/IP Gateway SDK v7.18.3 and earlier. This makes the first S0 key generated at startup predictable, potentially allowing network key prediction and unauthorized S0 network access.
Exploitability
AV:PAC:HPR:NUI:NScope
S:UImpact
C:HI:HA:H6.4/CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HOther