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PatchSiren cyber security CVE debrief

CVE-2016-9367 Moxa CVE debrief

CVE-2016-9367 is a high-severity availability issue in multiple Moxa NPort firmware families. NVD describes a condition where a malicious actor can request unrestricted resources, leading to resource exhaustion and denial of service. The supplied NVD data rates the issue CVSS v3.0 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Vendor
Moxa
Product
Unknown
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2016-09-04
Original CVE updated
2025-06-05
Advisory published
2016-09-04
Advisory updated
2025-06-05

Who should care

Operators and administrators responsible for Moxa NPort serial device servers, especially environments where the devices are reachable from broader operational networks or any untrusted network segment.

Technical summary

The vulnerability affects multiple Moxa NPort product families with firmware versions prior to vendor-fixed releases. According to the supplied description, the amount of resources requested by a malicious actor is not restricted, which can exhaust device resources and result in denial of service. NVD classifies the weakness as CWE-400 and lists a network-reachable, unauthenticated availability impact.

Defensive priority

High — remote unauthenticated availability impact on network-facing hardware warrants prompt firmware review, patching, and exposure reduction.

Recommended defensive actions

  • Inventory all Moxa NPort devices and map each unit to the exact affected series and firmware version.
  • Upgrade to the vendor-fixed firmware version for each affected product family as soon as operationally feasible.
  • Restrict network exposure for management and device services using segmentation, ACLs, and VPN access where appropriate.
  • Monitor for abnormal resource consumption, service interruption, or unexpected device resets that could indicate abuse.
  • If patching cannot be completed immediately, isolate affected devices from untrusted networks until they can be updated.

Evidence notes

The supplied corpus shows the CVE published on 2017-02-13 and last modified on 2026-05-13. NVD lists CVSS v3.0 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H and CWE-400. NVD references both US-CERT/ICS-CERT advisory ICSA-16-336-02 and SecurityFocus BID 85965. No KEV entry is present in the supplied timeline.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-9367 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-9367

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-9367 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-9367

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.