CVE-2026-10831

Medium

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.

SeverityMedium

CVSS6.9

Exploit probability—

ProductNPort 6000 Series

PublishedJun 16, 2026

First seenJun 16, 2026

Weakness typeCWE-862Missing authorization

How to fix

Vendor advisories

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

Affected products

Product	Affected versions	Fixed in
Moxa NPort 6000 Series	1.0 ≤ v ≤ 2.3	—
Moxa CN2600 Series	1.0 ≤ v ≤ 4.6	—

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