CVE-2026-16812: Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability

Critical severity, CVSS 10.0. Actively exploited: in CISA KEV since 2026-07-27. EPSS: 1% chance of exploitation in the next 30 days.

VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator. This functionality was intended to be for internal use only and is not intended to be remotely accessible. Hosted and Dedicated versions of VCO have already been patched in advance of this notice going out. This issue was discovered externally and is known to be actively exploited.

Affected products

• Arista VeloCloud Orchestrator: 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); version 7.0.0 only

Published 2026-07-27. Last modified 2026-07-28.