CVE-2026-16812: Arista VeloCloud Orchestrator OS command injection in on-prem host

CVE-2026-16812 · Severity: critical · CVSS 10 · Exploited in the wild · Published 2026-07-27

Arista VeloCloud Orchestrator is a management platform used to control and monitor SD-WAN network infrastructure. A critical security flaw allows unauthorized remote attackers to execute commands on the system, potentially leading to a full takeover of the orchestrator. This could result in the theft of sensitive network data, disruption of corporate connectivity, and unauthorized changes to network configurations.

Technologies: Arista Networks VeloCloud Orchestrator On-Prem. Vendors: Arista Networks.

Quick answers

Is CVE-2026-16812 exploited in the wild?
Yes. CVE-2026-16812 is known to be exploited in the wild, first recorded on 27 July 2026. Treat it as urgent.
How severe is CVE-2026-16812?
Critical severity, with a CVSS score of 10, published 27 July 2026.
Which products and versions are affected?
Arista Networks VeloCloud Orchestrator On-Prem 5.2.0 < 5.2.3.14, 6.1.0 < 6.1.3.4, 6.4.0 < 6.4.2.4, 7.0.0 < 7.0.0.1, 5.2.x prior to 5.2.3.14, 6.1.x prior to 6.1.3.4, 6.4.x prior to 6.4.2.4, 7.0.x prior to 7.0.0.1.
Is there a fix for CVE-2026-16812?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-16812 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-16812?
Check whether you run Arista Networks VeloCloud Orchestrator On-Prem at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An OS command injection vulnerability (CWE-78) exists in Arista VeloCloud Orchestrator (VCO) On-Prem due to improper neutralization of special elements in internal functionality that was unintentionally exposed to remote access. The vulnerability is network-reachable and requires no authentication or user interaction (AV:N/AC:L/PR:N/UI:N). Successful exploitation allows an attacker to execute arbitrary commands on the VCO host with high privileges, leading to a complete compromise of confidentiality, integrity, and availability. Arista has released patches for affected versions, and hosted/dedicated versions were patched prior to public disclosure. This vulnerability is known to be actively exploited.

Affected products

  • Arista Networks VeloCloud Orchestrator On-Prem 5.2.0 < 5.2.3.14, 6.1.0 < 6.1.3.4, 6.4.0 < 6.4.2.4, 7.0.0 < 7.0.0.1

Timeline

  • 2026-07-27: disclosed
  • 2026-07-27: advisory
  • 2026-07-27: exploited: Reported as actively exploited at the time of disclosure.

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