Arista VCO On-Prem RCE <5.2.3.14;6.1.3.4;6.4.2.4;7.0.0.1 Host Compromise
CVE-2026-16812 Published on July 27, 2026
VeloCloud Orchestrator OS Command Injection
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.
Known Exploited Vulnerability
This Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that 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.
The following remediation steps are recommended / required by July 30, 2026: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicab
Vulnerability Analysis
CVE-2026-16812 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2026-16812 has been classified to as a Shell injection vulnerability or weakness.
Affected Versions
Arista Networks VeloCloud Orchestrator On-Prem:- Version 5.2.0 and below 5.2.3.14 is affected.
- Version 6.1.0 and below 6.1.3.4 is affected.
- Version 6.4.0 and below 6.4.2.4 is affected.
- Version 7.0.0 and below 7.0.0.1 is affected.