CVE-2012-4777

Name: CVE-2012-4777
Creator: NVD / NIST
Published: 2012-11-14T00:55:01.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 24.75%

Last modified Jun 16, 2026

CVE-2012-4777 is a vulnerability of currently unknown severity. 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.". EPSS estimates a 24.75% chance of exploitation in the next 30 days.

Description

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."

Metrics

EPSS Probability

24.75%

97.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Microsoft	.Net Framework	4.0
Microsoft	.Net Framework	4.5

References

Timeline

Published: Nov 14, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-4777?

How severe is CVE-2012-4777?

Severity scoring for CVE-2012-4777 is pending analysis. The EPSS model estimates a 24.75% probability of exploitation in the next 30 days.

How do I fix CVE-2012-4777?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-4777?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST