RCE in Arista Velocloud Orchestrator
CVE-2026-16812
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.016 (73.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Arista Velocloud_orchestrator — versions 7.0.0
- Arista Networks Velocloud Orchestrator On-prem — versions 5.2.0, 6.1.0, 6.4.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: 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 applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
References
- psirt@arista.com (vendor-advisory, Mitigation, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2026-16812?
- CVE-2026-16812 is a critical-severity vulnerability in Arista Velocloud Orchestrator, classified under OS Command Injection. CVSS score: 10.0/10. Published 2026-07-27.
- How severe is CVE-2026-16812?
- Critical severity. CVSS v3 base score is 10.0 out of 10.
- Is CVE-2026-16812 known to be exploited?
- Yes. CVE-2026-16812 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-07-27), indicating it is being actively exploited.