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

> Remote attackers can execute OS commands on VeloCloud Orchestrator hosts, compromising confidentiality, integrity, and availability.

- **Severity:** Critical 10.0 (`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`)
- **Exploited in the wild:** Yes, since 27 Jul 2026 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Jul 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-f2cp-q2qv-6563

## What is CVE-2026-16812?

CVE-2026-16812 is a critical command injection vulnerability in Arista Networks VeloCloud Orchestrator On-Prem, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-16812?

It affects 1 product.


Products: Arista Velocloud Orchestrator.

## How do I fix CVE-2026-16812?

No fix has been published for CVE-2026-16812 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 30 Jul 2026.

## Is CVE-2026-16812 being exploited?

Yes. Attackers have exploited CVE-2026-16812 in the wild since at least 27 Jul 2026.

## Other vulnerabilities in Arista Networks VeloCloud Orchestrator On-Prem

- [CVE-2026-93952](https://insights.sbomify.com/CVE-2026-93952/): Arista VeloCloud Orchestrator Improper Input Validation (critical 9.5, exploited in the wild)
- [CVE-2026-114625](https://insights.sbomify.com/CVE-2026-114625/): Arista VeloCloud Orchestrator SQL Injection (critical 9.4, exploited in the wild)
- [CVE-2020-3973](https://insights.sbomify.com/CVE-2020-3973/): SQL injection in VMware SD-WAN by VeloCloud (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16812 and fix it if it is affected.

What it is: CVE-2026-16812 is a critical command injection vulnerability in Arista Networks VeloCloud Orchestrator On-Prem, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2026-16812 in the wild since at least 27 Jul 2026.

Affected product: Arista Networks VeloCloud Orchestrator On-Prem. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-16812/ (Markdown: https://insights.sbomify.com/CVE-2026-16812/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16812
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16812
- OSV: https://osv.dev/vulnerability/CVE-2026-16812

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16812/
Summaries are generated and may contain mistakes; the official description above is the record.