CVE WatchOct 24, 2026

CVE-2026-16812

Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability

CVSS

10.0

Critical

EPSS

1.0%

p63

KEV

YES

Jul 27, 2026

Exploit Today

0-100

Published: Jul 27, 2026 · Last modified: Oct 24, 2026 · CWE-78

EPSS · 30d

1.0%EPSS · 30 days1.0%

2026-09-272026-10-25

KEV catalog record

Product

Arista / VeloCloud Orchestrator

Vulnerability

Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability

Added to KEV

Jul 27, 2026

Remediate by

Jul 30, 2026

Known ransomware use

Summary description

Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that 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.

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.

Notes

https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-16812

Technical 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.

Official references

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