CVEs / CVE-2026-16812
CVE-2026-16812: Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 27 Jul 2026
- critical 10 CVSS 4.0 (from the CNA)
- EPSS 1.76% chance of exploitation in the next 30 days, higher than 77% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Arista Networks VeloCloud Orchestrator On-Prem | from 5.2.0, before 5.2.3.14 | 5.2.3.14 |
| Arista Networks VeloCloud Orchestrator On-Prem | from 6.1.0, before 6.1.3.4 | 6.1.3.4 |
| Arista Networks VeloCloud Orchestrator On-Prem | from 6.4.0, before 6.4.2.4 | 6.4.2.4 |
| Arista Networks VeloCloud Orchestrator On-Prem | from 7.0.0, before 7.0.0.1 | 7.0.0.1 |
Exploitation
| In CISA KEV since | 27 Jul 2026 |
|---|---|
| Due date for US federal agencies | 30 Jul 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 4.0 | 10 criticalCVSS: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:XScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-78 |
References
- CVE-2026-16812 on NVD
- CVE-2026-16812 in the CISA KEV catalog
- https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144 (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144 Mitigation, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-16812 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.