Severity: CriticalAction: Act nowExploitation: Exploited

Arista patches new VeloCloud Orchestrator zero-day exploited in attacks

Arista Networks released security updates to patch an actively exploited zero-day vulnerability affecting VeloCloud Orchestrator (VCO) On-Prem deployments.

Excerpt from the primary source: BleepingComputer

Who is affected

Security professionals

Why it matters

Source reporting says attackers are already exploiting this, so exposed affected systems are at immediate risk.

Automated: stated only from CISA listings and the exploitation evidence in the sources below.

What you should do · Act now

Treat this as an emergency. Identify every system running the affected products, apply the vendor's fix or published mitigations immediately, and check for signs of compromise. Patching alone does not remove an attacker who already got in.

Automated guidance based on this story's classification. Check the linked advisories for specifics.

Sources

We link to original and authoritative sources. Headlines and excerpts belong to their publishers.

Original reporting

Arista patches new VeloCloud Orchestrator zero-day exploited in attacks BleepingComputer · bleepingcomputer.com · Oct 22, 2026 · Primary source
Severity: HighAction: Patch

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