CVE-2010-20112 CRITICAL

CVE-2010-20112: Amlibweb NetOpacs webquery.dll Stack Buffer Overflow

Vendor Amlib
Product Amlibweb Library Management System
Weakness CWE-121
Published August 21, 2025
Last update April 7, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

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

What the vulnerability does

01Description

Amlib’s NetOpacs webquery.dll contains a stack-based buffer overflow vulnerability triggered by improper handling of HTTP GET parameters. Specifically, the application fails to enforce bounds on input supplied to the app parameter, allowing excessive data to overwrite memory structures including the Structured Exception Handler (SEH). Additionally, malformed parameter names followed by an equals sign may result in unintended control flow behavior. This vulnerability is exposed through IIS and affects legacy Windows deployments

Key dates

02Disclosure timeline

August 21, 2025 CVE published
April 7, 2026 Record updated