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Vulnerability Intelligence

CVE-2026-16812

CriticalExploitedPublic exploit

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.

Published Jul 27, 2026 · Updated Jul 28, 2026

Key Facts

Patch immediately
  • CVE-2026-16812 is a critical-severity vulnerability (CVSS 10.0 v4) affecting Velocloud Orchestrator (Arista), VeloCloud Orchestrator On-Prem.
  • It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 27, 2026. Public exploit code is available.
  • EPSS estimates a 1.0% probability of exploitation in the next 30 days.
  • Fixed versions are available, including Velocloud Orchestrator 5.2.3.14, Velocloud Orchestrator 6.1.3.4, Velocloud Orchestrator 6.4.2.4.
  • Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

10.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P

EPSS (30-day exploit likelihood)

1.0%

Higher than 62.1% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-16812 brief as a PDF

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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.

Known-Exploited Catalog Listings

CatalogAddedRemediation dueRansomware use
CISA KEVJul 27, 2026Jul 30, 2026Not reported
Industry KEV feedJul 27, 2026Jul 30, 2026Not reported
CIRCL KEVJul 27, 2026Jul 30, 2026Not reported
ENISA EUVDJul 27, 2026n/aNot reported

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

3 affected entries in total
ProductAffected versionsFixed in
Velocloud OrchestratorArista7.0.05.2.3.14
VeloCloud Orchestrator On-Prem>= 5.2.05.2.3.14

Patched Releases

Velocloud Orchestrator

5.2.3.14, 6.1.3.4, 6.4.2.4

VeloCloud Orchestrator On-Prem

5.2.3.14, 6.1.3.4, 6.4.2.4, 7.0.0.1

Timeline

  1. Publicly disclosed

    Jul 27, 2026

  2. Added to CISA KEV

    Jul 27, 2026

  3. Added to Industry KEV feed

    Jul 27, 2026

  4. Added to CIRCL KEV

    Jul 27, 2026

  5. Added to ENISA EUVD

    Jul 27, 2026

  6. Last updated

    Jul 28, 2026

Weakness Type

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

References

3 more references in the full CVE brief

FAQ

Common Questions.

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