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CISA KEV · Known exploitedCritical

CVE-2026-16812

Arista Networks VeloCloud Orchestrator On-Prem, velocloud orchestrator

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.

CVSS
10
EPSS
0.88%
55.7% percentile
CISA KEV
Listed
Published
2026.07.28
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability0.88%
Technical severityCVSS 10

Vulnerability overview

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 product and versions

Product
Arista Networks VeloCloud Orchestrator On-Prem, velocloud orchestrator
Affected versions
>= 5.2.0 < 5.2.3.14, >= 6.1.0 < 6.1.3.4, >= 6.4.0 < 6.4.2.4, >= 7.0.0 < 7.0.0.1, 7.0.0
Fixed versions
5.2.3.14, 6.1.3.4, 6.4.2.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
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.

Due date: 2026.07.30
  1. 1
    Identify

    Confirm that Arista Networks VeloCloud Orchestrator On-Prem, velocloud orchestrator and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X
CWE
CWE-78
KEV added
2026.07.27
Ransomware use
미확인
CVE-2026-16812 — Arista Networks VeloCloud Orchestrator On-Prem, velocloud orchestrator | SECUFOCUS NOW