CVE-2019-20031: Nec UM4730 Firmware
Critical severity, CVSS 9.1. EPSS: 1% chance of exploitation in the next 30 days.
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.
Affected products
Published 2020-07-29. Last modified 2026-06-17.