CVE-2026-10831: CWE-862: Missing Authorization in Moxa NPort 6000 Series
CVE-2026-10831 is a medium severity denial-of-service vulnerability in Moxa NPort 6000 Series devices, specifically version 1.0. The issue arises from missing authorization checks on the command port, allowing remote attackers to send crafted break signal commands without proper validation. This can disrupt serial communication for active user sessions.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-10831) affects Moxa NPort 6000 Series version 1.0. The command interface fails to verify that a sender is associated with a valid data port session before accepting break signal commands. As a result, a remote attacker with network access can send specially crafted requests to the command port, causing denial of service by interrupting serial communication for legitimate users. The CVSS 4.0 base score is 6.9, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and low impact on confidentiality and availability.
Potential Impact
An attacker can remotely disrupt serial communication sessions on affected devices, causing denial of service for active users. There is no indication of data confidentiality or integrity impact. The disruption affects availability of serial communication.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been published by Moxa as of the information available. Users should monitor vendor communications for updates and consider restricting network access to the command port to trusted sources as a precaution.
CVE-2026-10831: CWE-862: Missing Authorization in Moxa NPort 6000 Series
Description
CVE-2026-10831 is a medium severity denial-of-service vulnerability in Moxa NPort 6000 Series devices, specifically version 1.0. The issue arises from missing authorization checks on the command port, allowing remote attackers to send crafted break signal commands without proper validation. This can disrupt serial communication for active user sessions.
CVSS v4.0
Score 6.9medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-10831) affects Moxa NPort 6000 Series version 1.0. The command interface fails to verify that a sender is associated with a valid data port session before accepting break signal commands. As a result, a remote attacker with network access can send specially crafted requests to the command port, causing denial of service by interrupting serial communication for legitimate users. The CVSS 4.0 base score is 6.9, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and low impact on confidentiality and availability.
Potential Impact
An attacker can remotely disrupt serial communication sessions on affected devices, causing denial of service for active users. There is no indication of data confidentiality or integrity impact. The disruption affects availability of serial communication.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been published by Moxa as of the information available. Users should monitor vendor communications for updates and consider restricting network access to the command port to trusted sources as a precaution.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Moxa
- Date Reserved
- 2026-06-04T10:11:26.724Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a31650b0b89be6888c91ffb
Added to database: 6/16/2026, 3:00:27 PM
Last enriched: 6/16/2026, 3:16:03 PM
Last updated: 6/16/2026, 4:03:53 PM
Views: 2
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