CVE-2012-4777: n/a vulnerability

CVE-2012-4777: The code-optimization feature in the reflection implementation in Microsoft .NET Framework 4 and 4.5 does n...

The code-optimization feature in the reflection implementation in Microsoft .NET Framework 4 and 4.5 does not properly enforce object permissions, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (aka XBAP) or (2) a crafted .NET Framework application, aka "WPF Reflection Optimization Vulnerability."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:50 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2012-4777 is a remote code execution flaw in Microsoft .NET Framework 4 and 4.5. A crafted XBAP or .NET Framework application could bypass object permission enforcement in WPF reflection optimization and run attacker-controlled code. Treat exposed legacy Windows systems as business-relevant risk. Exposure is most likely on systems retaining Microsoft .NET Framework 4 or 4.5, especially where users can open XBAP content or run untrusted .NET/WPF applications. Prioritize remediation where old .NET versions remain on desktops or application servers. The impact is code execution, but the source bundle lacks current exploitation evidence or quantified severity. Mitigation focus: Apply Microsoft security guidance and updates from MS12-074.; Inventory systems for .NET Framework 4 and 4.5 installations.; Restrict execution of untrusted XBAP and .NET/WPF applications..

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

Conservative CVE-to-ATT&CK context

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Execution behavior lookup

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CVE-2012-4777 mapping review

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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:15960CVE 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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