CVE-2012-4776

critical Microsoft
CVSS v3 Base Score
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS Score
45.0%
Exploitation probability in 30 days
Top 2% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
M
Confidentiality
C
Integrity
C
Availability
C
Published: November 14, 2012 (4930 days ago)
Last Modified: April 29, 2026
Vendor: Microsoft
Source: NVD

Description

The Web Proxy Auto-Discovery (WPAD) functionality in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 does not validate configuration data that is returned during acquisition of proxy settings, which allows remote attackers to execute arbitrary JavaScript code by providing crafted data during execution of (1) an XAML browser application (aka XBAP) or (2) a .NET Framework application, aka "Web Proxy Auto-Discovery Vulnerability."

CWE

CWE-20

Affected Products

microsoft .net framework

References

🔗 osvdb.org 🔗 secunia.com 🔗 www.securityfocus.com 🔗 www.securitytracker.com 🔗 www.us-cert.gov