CVE-2016-20096
Received Received - Intake

Unauthenticated SQL Injection in Linknat VOS3000 and VOS2009

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: VulnCheck

Description
Linknat VOS3000 and VOS2009 through version 2.1.2.0 contain an unauthenticated SQL injection vulnerability that allows remote attackers to execute arbitrary SQL commands by manipulating the name parameter in a POST request to the login endpoint. Attackers can inject malicious SQL through the login form and retrieve injected query results from a subsequent session request, enabling extraction of plaintext credentials and other database content with DBA-level privileges.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-22
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
CVE-2016-20096
EUVD
EUVD-2016-10909

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
linknat vos3000 to 2.1.2.0 (inc)
linknat vos2009 to 2.1.2.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

Attack-Flow Graph

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Executive Summary

This vulnerability is an unauthenticated SQL injection flaw in Linknat VOS3000 and VOS2009 versions up to 2.1.2.0. Attackers can exploit it by sending a POST request to the login endpoint with a manipulated name parameter containing malicious SQL code. This allows them to execute arbitrary SQL commands and retrieve sensitive data like plaintext credentials or other database contents with database administrator privileges.

Detection Guidance

To detect this vulnerability, monitor network traffic for POST requests to the login endpoint of Linknat VOS3000 or VOS2009 with suspicious SQL injection patterns in the name parameter. Check for unusual database queries or credential extraction attempts.

Impact Analysis

This vulnerability allows remote attackers to gain unauthorized access to the system, extract sensitive data such as user credentials and database contents, and potentially take full control of the database with DBA-level privileges. It can lead to data breaches, unauthorized modifications, and service disruption.

Compliance Impact

This vulnerability can severely impact compliance with GDPR and HIPAA by enabling unauthorized access to and exfiltration of sensitive personal data. GDPR requires protection of personal data, and HIPAA mandates safeguarding protected health information. A successful exploit could result in non-compliance, leading to legal penalties, fines, and reputational damage.

Mitigation Strategies

Immediately update Linknat VOS3000 and VOS2009 to the latest patched version (2.1.2.0 or later). If an update is unavailable, restrict access to the login endpoint via firewall rules and disable unnecessary database privileges for the application.

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