Unauthenticated host compromise via exposed internal functionality
Published Jul 27, 2026 · Updated Jul 27, 2026
OS command injection in Arista VeloCloud Orchestrator On-Prem affected releases allows remote attackers to execute commands on the VCO host. An internal privileged function that was not intended for remote access is exposed remotely, but Arista has not disclosed the endpoint, parameter, or command construction path. No authentication, user interaction, or additional attack conditions are required; successful exploitation compromises the host and managed data.
Summary
What happened
OS command injection in Arista VeloCloud Orchestrator On-Prem affected releases allows remote attackers to execute commands on the VCO host. An internal privileged function that was not intended for remote access is exposed remotely, but Arista has not disclosed the endpoint, parameter, or command construction path. No authentication, user interaction, or additional attack conditions are required; successful exploitation compromises the host and managed data.
The record
- CVE
- CVE-2026-16812
- Published
- Jul 27, 2026
- Updated
- Jul 27, 2026
- Vendor
- Arista Networks
- Product
- VeloCloud Orchestrator On-Prem
- Classifications
- CWE-78, T1059
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 27, 2026CVE publishedPublication date reported by the CVE source.
- Jul 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.2.0 <5.2.3.14
- Affected versionversion=6.1.0 <6.1.3.4
- Affected versionversion=6.4.0 <6.4.2.4
- Affected versionversion=7.0.0 <7.0.0.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Arista-reported active exploitationreported exploitation
- CISA Known Exploited Vulnerabilities Catalog listingknown exploited catalog
Technologies
Your stack
See the directory against your own environment.
Your stack
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