Moxa Service in Moxa NPort 5150A firmware version 1.5 and earlier allows attackers to obtain sensitive configuration values via a crafted p…

published 2020-05-01 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4433

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits: 0; none known

Moxa Service in Moxa NPort 5150A firmware version 1.5 and earlier allows attackers to obtain sensitive configuration values via a crafted packet to UDP port 4800. NOTE: Moxa Service is an unauthenticated service that runs upon a first-time installation but can be disabled without ill effect.

Patch / fix

links 1

moxa.com/en/support/support/security-advisory/nport-5100a-series-se… advisory

Exploit prediction

1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

moxa.com /en/support/support/security-advisory/nport-5100a-series-serial-device-servers-vulnerability
patch, vendor-advisory
blog.scadafence.com /technical-blog-cve-2020-12117-industrial-iot-insecure-default-configurations
third-party-advisory

Sources

CVE List CVE-2020-12117
NVD CVE-2020-12117

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary