CVE-2012-4777

critical
Published 2012-11-14 · Modified 2026-04-29
CVSS v3
CVSS v2
9.3
VIR risk
9.3

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."

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

OS impact

OSVersionStatusFixed in
windows windowsnot-affected
windows windows-not-affected

Application impact

VendorProductVersionsFixed
windows microsoft.net_framework4.0
windows microsoft.net_framework4.5

References

CWEs

CWE-264

Verify integrity in audit chain (admin only). AS-IS.