# CVE-2025-5090: Arista CVX denial of service via improper input validation

Source: https://junglewise.ai/threats/cve-2025-5090-arista-cvx-denial-of-service-via-improper-input-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-05. Updated: 2026-06-05  
License: CC BY 4.0 with a link back

CVE-2025-5090 · Severity: medium · CVSS 6.5 · Published 2026-06-05

Arista CloudVision eXchange (CVX), a platform used to manage and coordinate network switch states, is vulnerable to a denial-of-service attack. An attacker with high-level access to a connected network switch can send malformed messages that cause the CVX software to crash. This results in instability across the CVX cluster, potentially disrupting network management operations and visibility.

Technologies: [Arista Networks CloudVision eXchange](https://junglewise.ai/threats/technologies/cloudvision-exchange). Vendors: [Arista Networks](https://junglewise.ai/threats/vendors/arista-networks).

## Quick answers

**Is CVE-2025-5090 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-5090 being exploited in the wild.

**How severe is CVE-2025-5090?** Medium severity, with a CVSS score of 6.5, published 5 June 2026.

**Which products and versions are affected?** Arista Networks CloudVision eXchange (CVX).

**Is there a fix for CVE-2025-5090?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2025-5090 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-5090?** Check whether you run Arista Networks CloudVision eXchange. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is classified as Improper Input Validation (CWE-20) within Arista CloudVision eXchange (CVX). The CVX agent fails to properly handle unexpected or malformed TCP messages sent from a connected switch. An attacker who has already gained high-privilege access to a switch within the network can exploit this by sending custom TCP packets to the CVX manager. This causes the CVX agent to crash, leading to a Denial of Service (DoS) and instability of the CVX cluster. The attack requires low-level network reachability (PR:L) but high-privilege access on the originating switch to craft the necessary traffic.

## Affected products

- Arista Networks CloudVision eXchange (CVX)

## Timeline

- 2026-06-05: advisory: Security advisory published by Arista Networks

## References

- [https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126](https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126)

## Related threats

- [Arista EOS and CVX denial of service via malformed messages](https://junglewise.ai/threats/cve-2025-5089-arista-eos-and-cvx-denial-of-service-via-malformed-messages)