# CVE-2026-107240: Versa VOS command injection in Node.js ZTP service

Source: https://junglewise.ai/threats/cve-2026-107240-the-node-js-web-service-on-vos-previously-versa-flexvnf-is-used  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-107240 · Severity: high · CVSS 7.6 · Published 2026-11-10

VOS is a network appliance that provides Zero Touch Provisioning through a Node.js web service. An attacker can inject shell commands through the authentication endpoint without needing valid credentials, gaining the ability to execute arbitrary code on the appliance. This impacts organizations using VOS that have not disabled the provisioning service after initial setup.

Technologies: [Versa-Networks VOS](https://junglewise.ai/threats/technologies/vos). Vendors: [Versa-Networks](https://junglewise.ai/threats/vendors/versa-networks).

## Quick answers

**Is CVE-2026-107240 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-107240 being exploited in the wild.

**How severe is CVE-2026-107240?** High severity, with a CVSS score of 7.6, published 10 November 2026.

**Which products and versions are affected?** Versa Networks VOS.

**Is there a fix for CVE-2026-107240?** No fixed version is recorded yet. Disable the Node.js web service after initial provisioning of the VOS device, as recommended in Versa's security hardening guide for Hubs, Branches, and Controllers.</anigation>
<parameter name="timeline">[{"kind": "disclosed", "at": "2026-11-10"}] If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-107240 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-107240?** Check whether you run Versa-Networks VOS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix


Disable the Node.js web service after initial provisioning of the VOS device, as recommended in Versa's security hardening guide for Hubs, Branches, and Controllers.</anigation>
<parameter name="timeline">[{"kind": "disclosed", "at": "2026-11-10"}]

## Technical details

The /authenticate endpoint in the Node.js ZTP web service passes unsanitized username and password parameters to shell execution via child_process.exec(). An incomplete sanitizer removes regex metacharacters but allows newline injection, enabling command chaining. An unauthenticated attacker can obtain a CSRF token from an unauthenticated page load and inject newline characters to execute arbitrary commands as the versa OS user.

## Affected products

- Versa Networks VOS

## References

- [https://security-portal.versa-networks.com/emailbulletins/6af2299bdd1c93ddc0a3e832](https://security-portal.versa-networks.com/emailbulletins/6af2299bdd1c93ddc0a3e832)

## Related threats

- [Versa VOS hardcoded decryption key in Node.js web service](https://junglewise.ai/threats/cve-2026-107244-the-node-js-web-service-on-vos-previously-versa-flexvnf-is-used)
- [Versa VOS Node.js web service session fixation via hardcoded secret](https://junglewise.ai/threats/cve-2026-107243-the-node-js-web-service-on-vos-previously-versa-flexvnf-is-used)
- [Versa VOS Node.js web service predictable session identifiers](https://junglewise.ai/threats/cve-2026-107242-the-node-js-web-service-on-vos-previously-versa-flexvnf-is-used)
- [Versa VOS Node.js web service authentication bypass with default credentials](https://junglewise.ai/threats/cve-2026-107241-the-node-js-web-service-on-vos-previously-versa-flexvnf-is-used)