CVE-2026-107244
Received Received - Intake

Hardcoded Decryption Key Authentication Bypass in Versa VOS

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 /decryptTest endpoint of this service is registered in server.js before the session authentication middleware and creates an authenticated session whenever it receives a token that decrypts successfully. Because the key and initialization vector (IV) used for decryption are hardcoded and identical across all VOS appliances, an unauthenticated attacker with network access can compute a valid token, submit it to /decryptTest, and obtain a fully authenticated session without providing any credentials.  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-2026-107244
EUVD
EUVD-2026-120626

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-1390 The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.

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 appliances. The /decryptTest endpoint is registered before session authentication middleware. It creates an authenticated session if a token decrypts successfully using hardcoded keys and IVs shared across all devices. An attacker can exploit this by computing a valid token and submitting it to gain full access without credentials.

Detection Guidance

Check if the Node.js web service is running on the VOS appliance. Use commands like 'netstat -tulnp | grep node' or 'ps aux | grep node' to identify active Node.js processes. Verify if the /decryptTest endpoint is accessible by sending a test request to the service.

Impact Analysis

An unauthenticated attacker with network access could gain full administrative control over the VOS appliance. This allows them to execute arbitrary commands, modify configurations, or access sensitive data. The impact is severe as it bypasses all authentication mechanisms.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements for GDPR (data protection) and HIPAA (health information security). It undermines access controls and audit mechanisms, potentially resulting in regulatory penalties and loss of trust.

Mitigation Strategies

Disable the Node.js web service on the VOS appliance as recommended by Versa's security hardening guide. This can typically be done by stopping the service and preventing it from restarting on boot. Ensure no unauthenticated access is possible to the /decryptTest endpoint.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-107244. 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...