CVE-2016-20096 PUBLISHED

Linknat VOS3000/VOS2009 2.1.2.0 SQL Injection via login.jsp

Assigner: VulnCheck
Reserved: 21.07.2026 Published: 21.07.2026 Updated: 21.07.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Kunshi Network Technology Co., Ltd.
Product	Linknat VOS3000
Versions	Default: affected Version 2.1.1.5 is affected Version 2.1.1.8 is affected Version 2.1.2.0 is affected

Vendor	Kunshi Network Technology Co., Ltd.
Product	Linknat VOS2009
Versions	Default: affected Version 2.1.1.5 is affected Version 2.1.1.8 is affected Version 2.1.2.0 is affected

Credits

Osama Khalid finder
Fatullayev Asadbek reporter

References

Problem Types

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') CWE