CVE-2012-4777

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 24.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-11-14 · updated 2026-06-16
Weakness: CWE-264

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."

Affected products

Microsoft .NET Framework: 4.0, 4.5

References

http://osvdb.org/87267
http://secunia.com/advisories/51236
http://www.securityfocus.com/bid/56464
http://www.securitytracker.com/id?1027753
http://www.us-cert.gov/cas/techalerts/TA12-318A.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-074
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15960
http://osvdb.org/87267
http://secunia.com/advisories/51236
http://www.securityfocus.com/bid/56464
http://www.securitytracker.com/id?1027753
http://www.us-cert.gov/cas/techalerts/TA12-318A.html

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