CVE-2026-107240
Received Received - Intake

Command Injection in Versa VOS Node.js ZTP Service

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: HackerOne

Description
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. The /authenticate endpoint of this service passes user-supplied username and password values to child_process.exec() through a sanitizer (escapeRegExp) that removes regular expression metacharacters but not newline characters. An unauthenticated attacker can inject a newline character into the username field to execute arbitrary shell commands as the versa OS service user. No credentials are required; the attacker needs only a CSRF token, which can be obtained from an unauthenticated page load.  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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-107240
EUVD
EUVD-2026-120629

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
versa vos *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-78 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.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability exists in the Node.js web service used for Zero Touch Provisioning (ZTP) on VOS devices. The /authenticate endpoint improperly sanitizes user input by removing regular expression metacharacters but not newline characters. An attacker can inject a newline into the username field to execute arbitrary shell commands as the versa OS service user without needing credentials, only requiring a CSRF token.

Detection Guidance

Check if the Node.js web service for ZTP is running on the VOS device. Use commands like 'ps aux | grep node' or 'netstat -tulnp | grep node' to identify active Node.js processes or listening ports. Verify if the /authenticate endpoint is accessible via HTTP requests.

Impact Analysis

An unauthenticated attacker could gain control of the VOS device by executing arbitrary commands with the privileges of the versa OS service user. This could lead to full system compromise, data theft, or disruption of services. The impact is limited to devices where the Node.js web service is still enabled after provisioning.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating compliance requirements for GDPR (data protection), HIPAA (health information security), and other regulations. Organizations using affected VOS devices may face legal penalties, reputational damage, and mandatory breach notifications.

Mitigation Strategies

Disable the Node.js web service for ZTP as recommended by Versa's security hardening guide. This can typically be done via the VOS device's management interface or by stopping the service using commands like 'systemctl stop versa-ztp' or 'service versa-ztp stop'.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-107240. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...