CVE-2026-10825 Improper JSON Input Validation in WebSocket API Leads to Denial of Service
A low-privileged attacker can cause a denial of service and device reboot in Moxa NPort devices by sending crafted JSON requests to the WebSocket API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10825?
CVE-2026-10825 is a high-severity denial of service vulnerability in Moxa NPort 6000-G2 Series, published on 16 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-1287
Which versions are affected by CVE-2026-10825?
How do I fix CVE-2026-10825?
No fix has been published for CVE-2026-10825 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-10825 being exploited?
There is no known exploitation of CVE-2026-10825 in the wild and no public exploit code.
Sources
Also known as GHSA-9269-mhf5-vfqw.