CVE-2010-20112CWE-121

Amlibweb NetOpacs webquery.dll Stack Buffer Overflow

Critical · published August 21, 2025

CVSS v4.0
9.3
EPSS
2%
Percentile
76.6
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
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
EPSS
0.01672 · 76.6th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2025-08-21T20:08Z
EPSS history
Timeline
  • 21 AUG 20:08Z
    Amlibweb NetOpacs webquery.dll Stack Buffer Overflow
    cvelistv5