Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability
Arista Networks — VeloCloud Orchestrator On-Prem
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.
10.0
0.9%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- Jul 27, 2026
- Modified
- Jul 28, 2026
- Added to KEV
- Jul 27, 2026
- Federal patch due
- Jul 30, 2026
CISA 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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2026-16812, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2026-16812 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is 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.
How severe is CVE-2026-16812?
CVE-2026-16812 has a CVSS base score of 10.0 out of 10 (CVSS 3.1).
Is CVE-2026-16812 actively exploited in the wild?
Yes. CVE-2026-16812 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 27, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-16812?
0.9% - meaning FIRST.org's EPSS model estimates a 0.9% probability this vulnerability will be exploited in the wild within 30 days (56% percentile among all scored CVEs).
What type of vulnerability is CVE-2026-16812?
CVE-2026-16812 is classified under CWE-78 (CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')).
Cross-checked against
Impactr finds and proves whether CVE-2026-16812 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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