What’s Vulnerable › Vulnerabilities
CVE-2025-5090: Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-05 · updated 2026-10-07
- Weakness: CWE-20
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.
Affected products
- Arista Networks EOS / CloudVision eXchange (CVX): from 4.34.0F through 4.34.1F; from 4.33.0M through 4.33.4M; from 4.32.0M through 4.32.6M; from 4.31.0 before 4.32.0; from 4.30.0 before 4.31.0 — fixed in 4.31.0, 4.32.0
How to fix
Upgrade to a fixed version: Arista Networks EOS / CloudVision eXchange (CVX) 4.31.0, 4.32.0. Check the vendor advisory for mitigations.
References
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