Actively exploited · Published Jul 27, 2026 · Assigned by Arista
CVE-2026-16812VeloCloud Orchestrator OS Command Injection
Critical 10.0 Exploited
In plain English
A critical-severity OS command injection in VeloCloud Orchestrator On-Prem from Arista Networks. Attackers are actively exploiting it in the wild (listed by CISA on July 27, 2026). The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 78% of all known vulnerabilities). 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.
CISA guidance
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.
Federal agencies must remediate by Jul 30, 2026.
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Arista Networks | VeloCloud Orchestrator On-Prem | 5.2.0 – before 5.2.3.146.1.0 – before 6.1.3.46.4.0 – before 6.4.2.47.0.0 – before 7.0.0.1 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- Security Advisory 0144 vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-16812 government-resource