KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-16812

VeloCloud Orchestrator OS Command Injection

Arista Networks / VeloCloud Orchestrator On-Prem · affected before 5.2.3.14

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Severity
CVSS 10.0 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
0.9%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-16812 is an unauthenticated VeloCloud Orchestrator OS Command Injection affecting Arista Networks VeloCloud Orchestrator On-Prem. VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Arista Networks / VeloCloud Orchestrator On-Prem affected before 5.2.3.14.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

VeloCloud Orchestrator OS Command Injection

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.

Vendor Product Affected Status
Arista Networks VeloCloud Orchestrator On-Prem Before 5.2.3.14 Affected
Arista Networks VeloCloud Orchestrator On-Prem Before 6.1.3.4 Affected
Arista Networks VeloCloud Orchestrator On-Prem Before 6.4.2.4 Affected
Arista Networks VeloCloud Orchestrator On-Prem Before 7.0.0.1 Affected
View vendor advisory (opens in new tab)
Published
27 Jul 2026
Exploitation Reported
27 Jul 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

cisa

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-16812
  • Security Advisory 0144 arista.com · Vendor Advisory https://www.arista.com/en/support/advisories-notices/security-advisor...

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 27 Jul 2026

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
CVE First 2026-07-27 16:20 UTC
CISA 2026-07-27 19:00 UTC
TheHackerNews 2026-07-28 04:43 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

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

EPSS

0.9%

Weaknesses

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

Recent mention · TheHackerNews

Attackers Exploit Arista VeloCloud Orchestrator Command Injection Flaw

A maximum-severity security flaw impacting on-premises versions of Arista VeloCloud Orchestrator (VCO) has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-16812 (CVSS score: 10.0), is a case of operating system command injection that could...

Read full advisory

All CVSS Scores

CVSS v4.0 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

CVSS v3.1 10.0 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Timeline

From disclosure to observed exploitation

  1. KEV confirmed by TheHackerNews

    Exploitation attested by an external source

  2. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. Added to KEV Intelligence KEV Feed

    High-confidence, third-party attested exploitation

  4. CVE published

    Vulnerability disclosed publicly

  5. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-16812

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-16812",
  "confidence": "Confirmed",
  "cvss_score": 10.0,
  "cvss_estimated": false,
  "epss_score": 0.00884,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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