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CRITICAL Actively exploited CWE-78

CVE-2026-16812

VeloCloud Orchestrator OS Command Injection

Arista·VeloCloud Orchestrator

10.0/ 10
CVSS 3.1
Critical severity
1.8%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 78% of all CVEs
Listed
CISA KEV catalog
Added
Jul 27, 2026
Fix due
Jul 30, 2026
Ransomware
Not known
Timeline
Published
Jul 27, 2026
Updated
Jul 28, 2026
First covered
Jul 29, 2026
Latest story
2 weeks ago

Summary

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.

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Attack profile

Attack vectorNetwork
ComplexityLow
PrivilegesNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

Affected products

  • Arista Networks VeloCloud Orchestrator On-Prem5.2.0 to before 5.2.3.146.1.0 to before 6.1.3.46.4.0 to before 6.4.2.47.0.0 to before 7.0.0.1

References

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