What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-07-27
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-27 · updated 2026-10-24
• Weakness: CWE-78

Description

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 Networks VeloCloud Orchestrator On-Prem: from 5.2.0 before 5.2.3.14; from 6.1.0 before 6.1.3.4; from 6.4.0 before 6.4.2.4; 7.0.0 — fixed in 5.2.3.14, 6.1.3.4, 6.4.2.4

How to fix

Upgrade to a fixed version: Arista Networks VeloCloud Orchestrator On-Prem 5.2.3.14, 6.1.3.4, 6.4.2.4. Check the vendor advisory for mitigations.

References

• https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-16812

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