CVE-2026-10831: Moxa CN2600 Series

Medium severity, CVSS 6.9. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Moxa CN2600 Series: from 1.0, up to and including 4.6
• Moxa Nport 6000 Series: from 1.0, up to and including 2.3

Published 2026-06-16. Last modified 2026-06-17.