CVE-2026-10831

MEDIUM

Moxa NPort 6000 Series - Improper Authorization of Break Signal Commands in Devices

Title source: rule

Description

A denial-of-service vulnerability exists in NPort devices because of improper access control on the command port. The command interface does not properly validate whether a sender is associated with a valid data port session before accepting break signal commands. A remote attacker with network access can send crafted requests to disrupt serial communication for an active user session.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-262370-cve-2026-10831-improper-authorization-vulnerability-in-serial-device-servers

Scores

CVSS v4 6.9

EPSS 0.0029

EPSS Percentile 20.9%

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-862

Status published

Products (2)

Moxa/CN2600 Series 1.0 - 4.6

Moxa/NPort 6000 Series 1.0 - 2.3

Published Jun 16, 2026

Tracked Since Jun 16, 2026