What is the CVSS score of CVE-2026-16812?

CVE-2026-16812 has a CVSS 4.0 base score of 10.0 (Critical). 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/S:P. EPSS exploitation probability: 1.0%.

Is there a public PoC exploit available for CVE-2026-16812?

Yes, a public proof-of-concept exploit is available for CVE-2026-16812. Prioritise patching immediately. EPSS: 1.0%.

Is there a patch available for CVE-2026-16812?

Yes, a patch is available for CVE-2026-16812. Update the affected software to the latest version immediately.

Velocloud Orchestrator CVE-2026-16812

EUVD-2026-49334 CRITICAL

OS Command Injection (CWE-78)

2026-07-27 psirt@arista.com

GHSA-f2cp-q2qv-6563

Command Injection Velocloud Orchestrator Arista

10.0

CVSS 4.0 · Vendor: arista

View

Vulnerability Assessment

Weakness

CWE

CWE-78

OWASP Top 10:2025

A05:2025 - Injection

ASVS 5.0

V1 - Encoding and Sanitization OS command sanitization, avoid shell exec

MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 1.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Command injection vulnerability in VeloCloud Orchestrator (VCO) on-premises allows unauthenticated remote attackers to access internal functionality and fully compromise the host system, impacting data managed by the orchestrator. This issue is known to be actively exploited. Hosted and Dedicated VCO versions have been pre-emptively patched.

Affected VersionsENISA

VeloCloud Orchestrator On-Prem 7.0.0 <7.0.0.1

VeloCloud Orchestrator On-Prem 6.4.0 <6.4.2.4

VeloCloud Orchestrator On-Prem 6.1.0 <6.1.3.4

VeloCloud Orchestrator On-Prem 5.2.0 <5.2.3.14

Affected Packages

euvd velocloud_orchestrator_on_prem fix: 5.2.3.14, 6.1.3.4, 6.4.2.4, 7.0.0.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (arista) PRIMARY 10.0 CRITICAL

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

Primary rating from Vendor (arista) · only source for this CVE.

CVSS VectorVendor: arista

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

High

Vulnerable system: Availability

High

Subsequent system: Confidentiality

High

Subsequent system: Integrity

High

Subsequent system: Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 27, 2026 - 19:32 CISA

Patch available

Jul 27, 2026 - 17:02 EUVD

CVE Published

Jul 27, 2026 - 16:17 cve.org

CRITICAL 10.0

DescriptionCVE.org

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.

Threat Intelligence Overview

Threat Score

5.0/10

Composite threat intelligence

EPSS Score

1.0%

Top 41% exploitable

Exploit

POC

Public exploit code exists

Social Media

Sightings

Data Quality

7 sources

Confidence: High

EUVD

NVD

CVE.org

CISA KEV

EPSS

Vulnrichment CIRCL

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV Yes

Public POC Yes

EPSS 1.0%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.