PatchTheCVECVE-2026-93952: Arista VeloCloud Orchestrator Improper Input Validation Vulnerability
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CRITICAL 10.0EXPLOITEDREMOTEUPGRADE
CVE-2026-93952 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. Hosted, including Dedicated, versions of VCO were impacted and have already been patched.
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 | 1.1% (top 36%) |
| CISA exploited list | Yes, fix due 2026-09-25 |
| Weakness | CWE-20 |
| Published | 2026-09-22 |
| Last modified | 2026-09-23 |
Publisher (CNA): Arista Networks, Inc. · Vendor: arista
Am I affected?
Timeline
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Published CVE record published
- Updated Record last modified
- Deadline CISA due date for US federal agencies to patch
arista velocloud orchestrator UPGRADE
Affected: >= 5.2.0 and < 5.2.3.16 · >= 6.1.0 and <= 6.1.3.7 · >= 6.4.0 and < 6.4.2.8 · >= 7.0.0 and <= 7.0.0.2
Fixed in: 5.2.3.16, 6.4.2.8
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 5.2.3.16 (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 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source
sudo dnf upgrade --advisory=FEDORA-2026-0602a84203
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.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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