CVE-2025-5090 Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages
An attacker with high privileges on a connected switch can send unexpected messages to crash CloudVision eXchange agents, causing cluster instability and denial of service.
- 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-2025-5090?
CVE-2025-5090 is a high-severity denial of service vulnerability in Arista Networks EOS / CloudVision eXchange (CVX), published on 5 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.
Weakness: CWE-20
Which versions are affected by CVE-2025-5090?
How do I fix CVE-2025-5090?
No fix has been published for CVE-2025-5090 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-2025-5090 being exploited?
There is no known exploitation of CVE-2025-5090 in the wild and no public exploit code.
Sources
Also known as GHSA-3hcx-j6wp-vh2q.