CVE-2026-16812

Analyzed
Published: 27 Jul 2026, 16:11
Last modified:28 Jul 2026, 03:56

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
10 CRITICAL
v4.0 (cve.org)
EPSS Score
0.88% LOW
1% probability 0.00%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Jul 2026, 16:11
Published
Vulnerability first disclosed
27 Jul 2026, 00:00
Added to CISA KEV
Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability
28 Jul 2026, 03:56
Last Modified
Vulnerability information updated
30 Jul 2026, 00:00
CISA Remediation Due
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.

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 Metrics

  • v4.0•CRITICAL•Score: 10CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P
  • v4.0•CRITICAL•Score: 10CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X
  • v3.1•CRITICAL•Score: 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.88%• Percentile: 57%

Techniques & Countermeasures

  • CWE-78•Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

    The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Affected Systems

  • arista networks•velocloud orchestrator on-prem

    ≥ 5.2.0, < 5.2.3.14 | ≥ 6.1.0, < 6.1.3.4 | ≥ 6.4.0, < 6.4.2.4 | ≥ 7.0.0, < 7.0.0.1

  • arista•velocloud_orchestrator

    ≥ 5.2.0, < 5.2.3.14 | ≥ 6.1.0, < 6.1.3.4 | ≥ 6.4.0, < 6.4.2.4 | 7.0.0

References (2)