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

Patch now

CRITICAL 10.0EXPLOITEDREMOTEUPGRADE

CVE-2026-16812 is a critical-severity flaw (CVSS 10.0) affecting velocloud orchestrator, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 Dedica

Why this priority

Critical severity
Exploited in the wild (CISA KEV)
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	Yes, fix due 2026-07-30
Weakness	CWE-78
Published	2026-07-27
Last modified	2026-10-24

Publisher (CNA): Arista Networks, Inc. · Vendor: arista

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-27Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-07-27 16:17 UTCPublished CVE record published
2026-07-30Deadline CISA due date for US federal agencies to patch
2026-10-24 13:10 UTCUpdated Record last modified

arista velocloud orchestrator UPGRADE

Affected: >= 5.2.0 and < 5.2.3.14 · >= 6.1.0 and < 6.1.3.4 · >= 6.4.0 and < 6.4.2.4 · 7.0.0

Fixed in: 5.2.3.14, 6.1.3.4, 6.4.2.4

Safe to downgrade to: a release before 5.2.0

1. Check installed version

apt-cache policy velocloud-orchestrator || rpm -q velocloud-orchestrator || velocloud-orchestrator --version

2. UPGRADE to 5.2.3.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade velocloud-orchestrator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade velocloud-orchestrator

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison velocloud-orchestrator sudo apt install velocloud-orchestrator=<VERSION_BEFORE_5.2.0> sudo apt-mark hold velocloud-orchestrator

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list velocloud-orchestrator sudo dnf downgrade velocloud-orchestrator-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add velocloud-orchestrator

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-16812?

velocloud orchestrator: upgrade to 5.2.3.14, 6.1.3.4, 6.4.2.4. Exact commands for each OS are on this page.

Is CVE-2026-16812 being exploited?

Yes. CVE-2026-16812 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2026-16812 affect?

CVE-2026-16812 affects velocloud orchestrator. Severity is critical (CVSS 10.0). 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, integrit

How urgent is CVE-2026-16812?

Priority 84/100. Critical severity; Exploited in the wild (CISA KEV); CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

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References

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