NEC UM8000, UM4730 and prior non-InMail voicemail systems with all known software versions may permit an infinite number of login attempts in the telephone user interface (TUI), effectively allowing brute force attacks.
nec
CVE-2019-20032
An attacker with access to an InMail voicemail box equipped with the find me/follow me feature on Aspire-derived NEC PBXes, including all versions of SV8100, SV9100, SL1100 and SL2100 devices, may access the system’s administration modem.
CVE-2019-20033
On Aspire-derived NEC PBXes, including all versions of SV8100 devices, a set of documented, static login credentials may be used to access the DIM interface.