# CVE-2026-16812: Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability

- Exploited (CISA KEV): yes, added 2026-07-27
- Published: 2026-07-27
- CVSS: 10 CRITICAL (v4.0)
- EPSS: 1.8% (78th percentile)
- CWE: CWE-78

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

## Social

1 posts seen since 2026-11-02.

- x 2026-11-02: Volt Typhoon ran 4 zero-day campaigns through a covert network targeting endpoint management platforms and SD-WAN orchestrators. Hundreds of victims. Sessions averaged 4 hours, then every artifact was cleaned up. Ask your IT provider about CVE-2026-20127 and CVE-2026-16812. (https://x.com/theautomate_io/status/2117374396675321923)

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2026-16812 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-16812