Public vulnerability disclosure

CVE-2026-10825

Improper JSON Input Validation in WebSocket API Leads to Denial of Service

publishedCWE-1287

A denial-of-service vulnerability exists in the WebSocket API due to insufficient validation and handling of JSON-based requests. A low-privileged authenticated attacker can send a specially crafted request that causes service disruption and may result in an unexpected device reboot.

Investigate in Cyber JSON Markdown

Technical severity7.1 highCVSS 4.0 · CNA: Moxa

Published2026-06-16Source updated 2026-11-02

Collected2026-11-022 attributed sources

Fixes and workarounds

Fix

Please refer to the security advisory: https://www.moxa.com/en/support/product-support/security-advisory/mpsa-268270-cve-2026-10825-improper-validation-of-input-vulnerability-in-serial-device-servers

Source: CNA: Moxa

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
NPort 6000-G2 Series Moxa	≥ 1.0; ≤ 1.1.0 (affected, custom) 1.2.0 (unaffected, custom) Other versions: unaffected	CNA: Moxa

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 7.1 high	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`	CNA: Moxa

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-268270-cve-2026-10825-improper-validation-of-input-vulnerability-in-serial-device-serversCNA: Moxa · vendor-advisory