CVE-2026-16812
CRITICAL · 10.0 KEV EPSS 0.9%KEV-listed, vendor confirms active exploitation, urgent patching underway.
What: Remote command injection in Arista VeloCloud Orchestrator (on-prem) allowing unauthenticated attackers to execute arbitrary code and compromise confidentiality, integrity, and availability. CVSS 10.0 CRITICAL.
Why it matters: KEV-listed same day as publication. NVD explicitly states "actively exploited" in the wild. Vendor has already patched Hosted/Dedicated versions; on-prem users face immediate risk. Affected versions span 5.2.x through 7.0.x. Social chatter reflects defender urgency and vendor transparency concerns.
Where it's seen: CISA threat stream alerts, security researcher posts detailing vulnerable version ranges, and broad social commentary questioning Arista's patch timeline and oversight. No public PoC drop observed yet, but active exploitation confirmed by vendor disclosure.
RISK: CRITICAL — Actively exploited, KEV-listed, CVSS 10.0, affects critical infrastructure orchestration.
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Attack vector
- Network
- Complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High