# CVE-2026-10825: Moxa NPort 6000-G2 Series denial of service in WebSocket API

Source: https://junglewise.ai/threats/cve-2026-10825-moxa-nport-6000-g2-series-denial-of-service-in-websocket-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-16. Updated: 2026-06-16  
License: CC BY 4.0 with a link back

CVE-2026-10825 · Severity: info · CVSS 7.1 · Published 2026-06-16

A security vulnerability has been identified in Moxa NPort 6000-G2 series serial device servers, which are used to connect industrial serial devices to networks. An attacker with low-level access credentials can send a malicious request that crashes the device or causes it to reboot unexpectedly. This can lead to a loss of connectivity for critical industrial equipment and disrupt operations.

Vendors: [Moxa](https://junglewise.ai/threats/vendors/moxa).

## Quick answers

**Is CVE-2026-10825 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10825 being exploited in the wild.

**How severe is CVE-2026-10825?** Informational severity, with a CVSS score of 7.1, published 16 June 2026.

**Which products and versions are affected?** Moxa NPort 6000-G2 Series v1.1.0 and earlier; Moxa NPort 6400-G2 Series v1.1.0 and earlier; Moxa NPort 6600-G2 Series v1.1.0 and earlier.

**Is there a fix for CVE-2026-10825?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-10825 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-10825?** Check whether you run Moxa NPort 6000-G2 Series, Moxa NPort 6100-G2 Series, Moxa NPort 6200-G2 Series or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A denial-of-service (DoS) vulnerability exists in the WebSocket API of Moxa NPort 6000-G2 series serial device servers due to improper validation of input types (CWE-1287). The root cause is insufficient handling of JSON-based requests within the API component. A remote attacker with low-privileged authentication can exploit this by sending a specially crafted JSON request over the network. Successful exploitation results in service disruption or an unexpected hardware reboot. Moxa has released firmware version v1.2.0 to address this issue.

## Affected products

- Moxa NPort 6000-G2 Series v1.1.0 and earlier
- Moxa NPort 6100-G2/6200-G2 Series v1.1.0 and earlier
- Moxa NPort 6400-G2 Series v1.1.0 and earlier
- Moxa NPort 6600-G2 Series v1.1.0 and earlier

## Timeline

- 2026-06-16: advisory: Moxa published security advisory MPSA-268270
- 2026-06-16: disclosed: CVE-2026-10825 published to NVD dataset

## References

- [https://www.moxa.com/en/support/product-support/security-advisory/mpsa-268270-cve-2026-10825-improper-validation-of-input-vulnerability-in-serial-device-servers](https://www.moxa.com/en/support/product-support/security-advisory/mpsa-268270-cve-2026-10825-improper-validation-of-input-vulnerability-in-serial-device-servers)