CVE-2026-107241: High severity Versa VOS vulnerability
The Node.js web service on VOS (previously Versa FlexVNF) is used for URL-based Zero Touch Provisioning (ZTP) of the VOS appliance and is not required after provisioning is complete. This service authenticates users and administrators to its web interface during initial provisioning using default credentials and HTTP Basic Authentication. An attacker with network access who knows the default credentials could authenticate to the service and perform provisioning actions on the VOS appliance.
Versa’s security hardening guide for Hubs, Branches, and Controllers recommends disabling the Node.js web service after the initial provisioning of the VOS device. This vulnerability is not exploitable on VOS devices where the Node.js web service has been disabled.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Disable the Node.js web service after initial provisioning of the VOS appliance.
VOS Node.js web service service status = disabled
Event History
Frequently Asked Questions
Which VOS deployments are exposed?
Only VOS devices with the Node.js web service still enabled are exposed. The service is used for URL-based Zero Touch Provisioning and is not required after provisioning is complete.
What does an attacker need to exploit this issue?
An attacker needs network access to the Node.js web service and knowledge of its default credentials. Exploitation also requires authenticating through the service's HTTP Basic Authentication interface.
What should be done if the device has already been provisioned?
Disable the Node.js web service after initial provisioning is complete, as recommended in Versa’s security hardening guidance. Devices where this service is disabled are not exploitable through this issue.