Is CVE-2019-20031 actively exploited?

No active exploitation of CVE-2019-20031 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-20031 be exploited remotely?

Yes. CVE-2019-20031 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-20031?

CVE-2019-20031 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2019-20031

CRITICAL

CVE-2019-20031

CWE-307Published: July 29, 2020· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-20031 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.