CVE-2026-16812
KEV: known exploited SSVC: activeVeloCloud Orchestrator OS Command Injection
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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
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
Attack conditions and impact
Derived from the CNA (via NVD) CVSS 3.1 vectorThis vulnerability may be exploitable over the internet without authentication or user interaction.
| Metric | Value | Meaning |
|---|---|---|
| Attack vector AV | N | Network |
| Attack complexity AC | L | Low (easy) |
| Privileges required PR | N | None |
| User interaction UI | N | None |
| Scope S | C | Changed (affects other components) |
| Confidentiality C | H | High |
| Integrity I | H | High |
| Availability A | H | High |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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.
Solutions (CNA)
The recommended resolution is to upgrade to a fixed VCO release at your earliest convenience. This vulnerability has been fixed in the following releases: * VCO 5.2.3.14 and later in the 5.2 train * VCO 6.1.3.4 and later in the 6.1 train * VCO 6.4.2.4 and later in the 6.4 train
Workarounds (CNA)
The recommended resolution is to upgrade to a fixed VCO release as soon as it is available. For VCOs which are not on a supported release train, customers can contact TAC to discuss possible upgrade options for your release. Until the fixed software is deployed, operators should apply defense-in-depth controls appropriate for their environment: * Restrict access to the VCO web interface to trusted administrative networks. * Monitor the VCO for accesses from known malicious source IPs. * Monitor for unexpected outbound network activity from the VCO host. * Review recent administrator activity for unexpected changes.
CISA KEV entry
Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability — Arista / VeloCloud Orchestrator
Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that 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.
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.
https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-16812
CVSS assessments
| Provider | Version | Score | Vector |
|---|---|---|---|
| NVD / [email protected] (Secondary) | 4.0 | 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/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 |
| NVD / [email protected] (Secondary) | 3.1 | 10.0 CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| CNA / Arista | 3.1 | 10.0 CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| CNA / Arista | 4.0 | 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 |
Affected products and packages
CNA (CVE.org)
| Vendor | Product | Versions |
|---|---|---|
| Arista Networks | VeloCloud Orchestrator On-Prem | affected: 5.2.0 … < 5.2.3.14 affected: 6.1.0 … < 6.1.3.4 affected: 6.4.0 … < 6.4.2.4 affected: 7.0.0 … < 7.0.0.1 default: unaffected |
NVD CPE (4)
Show CPE list
| Vendor | Product | Range | CPE |
|---|---|---|---|
| arista | velocloud_orchestrator | >= 5.2.0, < 5.2.3.14 | cpe:2.3:a:arista:velocloud_orchestrator:*:*:*:*:*:*:*:* |
| arista | velocloud_orchestrator | >= 6.1.0, < 6.1.3.4 | cpe:2.3:a:arista:velocloud_orchestrator:*:*:*:*:*:*:*:* |
| arista | velocloud_orchestrator | >= 6.4.0, < 6.4.2.4 | cpe:2.3:a:arista:velocloud_orchestrator:*:*:*:*:*:*:*:* |
| arista | velocloud_orchestrator | cpe:2.3:a:arista:velocloud_orchestrator:7.0.0:*:*:*:*:*:*:* |
Linux distribution status
References (2)
- https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144 NVD, CNA MitigationVendor Advisoryvendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-16812 NVD, ADP CISA-ADP US Government Resourcegovernment-resource