CVE-2026-17191: Arista Networks VeloCloud Orchestrator On-Prem

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

An input validation vulnerability exists in an API component of the orchestrator. An authenticated user can exploit this flaw to manipulate backend queries, which may result in unauthorized access to data beyond their intended privileges and cause the underlying system to initiate unintended outbound network connections. This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.

Affected products

• Arista Networks VeloCloud Orchestrator On-Prem: from 5.2.0, before 5.2.3.14 (fixed in 5.2.3.14); from 6.1.0, before 6.1.3.4 (fixed in 6.1.3.4); from 6.4.0, before 6.4.2.4 (fixed in 6.4.2.4)

Published 2026-07-27. Last modified 2026-07-30.