CVE-2026-16812

Arista VeloCloud Orchestrator command injection, confirmed exploited in the wild.

Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that 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.

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1.8%chance of exploitation in the next 30 days (EPSS), 78th percentile

27 Juladded to CISA's Known Exploited Vulnerabilities list, 2026

30 Julfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability
Vendor and product	Arista · VeloCloud Orchestrator
Type	command injection · CWE-78
Exploited	Confirmed by CISA listed 27 July 2026
Likelihood	more likely to be exploited than most
Deadline	30 July 2026 · already passed
Used in ransomware	Not reported
Advisories	www.arista.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗ · nvd.nist.gov ↗

What to do

Three steps, in this order

Step 1

Apply the vendor fix; command injection on an exposed device is used within days of disclosure.

Step 2

Restrict the management interface to a trusted network until the fix is in.

Step 3

Review the device's logs and configuration for changes you did not make.

CISA's required action	Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA's required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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Questions

CVE-2026-16812 in short

Is CVE-2026-16812 being exploited?

Yes. CISA added CVE-2026-16812 to its Known Exploited Vulnerabilities catalogue on 27 July 2026, which it does only on evidence of exploitation in the wild.

What is the CISA deadline for CVE-2026-16812?

US federal agencies must remediate it by 30 July 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2026-16812 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 1.8%, the 78th percentile of every CVE it scores.

How do I fix CVE-2026-16812?

Apply the vendor fix; command injection on an exposed device is used within days of disclosure. Restrict the management interface to a trusted network until the fix is in. Review the device's logs and configuration for changes you did not make.

Same vendor

Other Arista vulnerabilities being exploited

CVE	Product	Type	Listed
CVE-2026-114625	VeloCloud Orchestrator	SQL injection	23 October 2026
CVE-2026-93952	VeloCloud Orchestrator	privilege escalation	22 September 2026
CVE-2026-7473	Extensible Operating System	exploited vulnerability	9 June 2026

Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.