# CVE-2026-10825: Improper JSON Input Validation in WebSocket API Leads to Denial of Service

Status: published. Published: 2026-06-16. Updated: 2026-11-02.

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.

## Remediation

- 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

- Moxa / NPort 6000-G2 Series: ≥ 1.0; ≤ 1.1.0 (affected, custom); 1.2.0 (unaffected, custom). Source: CNA: Moxa

## Severity and prioritization

- CVSS 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; source: CNA: Moxa

- CISA KEV: No listing in collected sources

- EPSS: 0.24% as of 2026-11-01; percentile 15.14%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-1287

## 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-servers (CNA: Moxa; vendor-advisory)

## Provenance

- CNA: Moxa: https://www.cve.org/CVERecord?id=CVE-2026-10825; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-10825; retrieved 2026-11-02; source updated Not reported

Revision: 47f386f44c53df80ccb56c1b225bc57053288c046970946c1152ae853666bb25

Canonical: https://y2.dev/cve/CVE-2026-10825