Security Advisory 0179 PDF

Date: September 9, 2026

Revision Date Changes
1.0 September 9, 2026 Initial release

The CVE-ID tracking this issue: CVE-2026-86106
CVSSv3.1 Base Score: 9.6 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
CVSSv4.0 Base Score: 8.7 (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
Common Weakness Enumeration: CWE-306: Missing Authentication for Critical Function
This vulnerability is being tracked by BUG1833882.

Description

On a VeloCloud Edge, an unauthenticated actor with network access to the private HA (High Availability) interconnect may trigger sensitive HA peer functions without verification. This could result in elevated command execution on Edge units where HA is enabled.

This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Vulnerability Assessment

Platform and Software Applicability Note

To determine actual exposure, operators should first check their software versions against the "Affected Software" list below. If your software release is not listed, your deployment is not vulnerable, regardless of the hardware platform in use.

Affected Software

VeloCloud Edge Versions
 
  • 6.4.1.x and below releases in the 6.4.x train
  • 6.1.4.x and below releases in the 6.1.x train
  • 5.2.6.x and below releases in the 5.2.x.x train
  • All prior releases

Affected Platforms

The following products are affected by this vulnerability:
 
  • VeloCloud Edge (Formerly VeloCloud Edge by Broadcom)
 
The following product versions and platforms are not affected by this vulnerability:
 

 

  • Arista EOS-based products:
    • 710 Series
    • 720D Series
    • 720XP/722XPM Series
    • 750X Series
    • 7010TX Series 
    • 7020R/R4 Series
    • 7130 Series running EOS
    • 7170 Series
    • 7050X3/X4 Series
    • 7060X/X2/X4/X5/X6 Series
    • 7260X/X3 Series
    • 7280R/R2/R3/R4 Series
    • 7300X/X3 Series
    • 7320X Series
    • 7358X4 Series
    • 7368X4 Series
    • 7388X5 Series
    • 7500R/R2/R3 Series
    • 7800R3/R4 Series
    • 7700R4 Series
    • AWE 5000 Series
    • AWE 7200R Series
    • CloudEOS
    • cEOS-lab
    • vEOS-lab
    • CloudVision eXchange, virtual or physical appliance
  • Wi-Fi Access Points
  • CloudVision CUE, virtual appliance or physical appliance
  • CloudVision CUE cloud service delivery
  • CloudVision Portal, virtual appliance or physical appliance
  • CloudVision Appliance Software
  • CloudVision as-a-Service
  • CloudVision AGNI - Cloud service delivery
  • CloudVision AGNI - Virtual or physical appliance
  • Arista 7130 Systems running MOS
  • Arista Converged Cloud Fabric (formerly Big Switch BCF)
  • DANZ Monitoring Fabric (DMF) - Controller Appliance
  • DANZ Monitoring Fabric (DMF) - Analytics Node Appliance
  • DANZ Monitoring Fabric (DMF) - Recorder Node Appliance
  • DANZ Monitoring Fabric (DMF) - Service Node Appliance
  • Arista Multi Cloud Director (formerly Big Switch MCD)
  • Arista Network Detection and Response (NDR) Security Platform (Formerly Awake NDR)
  • Arista Edge Threat Management - Arista NG Firewall and Arista Micro Edge (Formerly Untangle)
  • Arista NetVisor OS, Arista NetVisor UNUM, and Insight Analytics (Formerly Pluribus)
  • VeloCloud Orchestrator (Formerly VeloCloud Orchestrator by Broadcom)
  • VeloCloud Gateway (Formerly VeloCloud Gateway by Broadcom)

Required Configuration for Exploitation

Exploitation requires HA to be enabled and the attacker to have Layer 2 network access to the dedicated HA interconnect. In the VeloCloud Orchestrator, select the VeloCloud Edge and review its Device > High Availability configuration to determine whether Active/Standby HA is enabled. The standard direct port-to-port HA connection limits access; extending the HA connection through a shared switch or VLAN increases exposure.

VeloCloud

Indicators of Compromise

No reliable, vulnerability-specific indicators of compromise have been identified. In an VeloCloud Edge diagnostic bundle, unexpected HA management log entries containing Executing command '<command>' as requested by the active Edge should be investigated, particularly when the command is unrelated to expected HA operation. The absence of this message does not establish that exploitation has not occurred.

Customers with suspicious HA activity should contact Arista TAC.

Mitigation

Until an upgrade can be completed, customers should:
 
  • Use the recommended direct, dedicated port-to-port connection between the HA pair.
  • Do not extend the HA interconnect through a shared or user-accessible switch or VLAN.
  • Restrict physical and network access to the HA interfaces.

Resolution

Migrating to a patched software version for VeloCloud Edge is the advised course of action. Arista suggests that operators transition to the most recent release within a supported branch that incorporates the necessary remediations.

The vulnerability identified as CVE-2026-86106 is addressed in the following versions:
 
  • 7.0.0 and later releases
  • 6.4.2 and later releases in the 6.4.x train
  • 6.1.5.0 and later releases in the 6.1.x train
  • 5.2.7.0 and later releases in the 5.2.7.x train

Hotfix

No hotfix is available for this issue.

For More Information

If you require further assistance, or if you have any further questions regarding this security notice, please contact the Arista Networks Technical Assistance Center (TAC) by one of the following methods:

Open a Service Request

Contact information needed to open a new service request may be found at:
https://www.arista.com/en/support/customer-support