CVE-2012-4776: n/a vulnerability

CVE-2012-4776: The Web Proxy Auto-Discovery (WPAD) functionality in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:42 UTC (UTC+00:00)

Security readout for executives and security teams

A vulnerable .NET application could trust malicious proxy auto-discovery data and run attacker-supplied JavaScript. The practical risk is highest for legacy Windows environments still running the listed .NET Framework versions and using WPAD or XBAP/.NET applications that acquire proxy settings automatically. Exposure is likely limited to legacy systems with affected .NET Framework versions and applications that invoke WPAD-based proxy discovery. Modern fully patched systems are less likely exposed, but the bundle does not provide current product lifecycle or patch-state evidence. Treat this as a legacy technology risk that deserves prompt inventory and patch verification, especially on user endpoints and environments using automatic proxy discovery. It is not KEV-listed in the provided bundle, so urgency depends on confirmed exposure. Mitigation focus: Review and apply Microsoft MS12-074 vendor guidance for affected .NET Framework versions.; Inventory systems running .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, or 4.5.; Identify applications using XBAP or automatic proxy discovery through .NET..

Prepared: Jun 24, 2026, 12:04 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 14, 2012, 00:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
MS12-074CVE reference · vendor-advisory, x_refsource_MS
oval:org.mitre.oval:def:15810CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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