Is CVE-2013-3133 being actively exploited?

CVE-2013-3133 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-3133?

CVE-2013-3133 has a CVSS 2.0 base score of 9.3 (HIGH).

CVE-2013-3133

HIGH · CVSS 9.3EPSS 20.6%EU EUVD

Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 does not properly check the permissions of objects that use reflection, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (XBAP) or (2) a crafted .NET Framework application, aka "Anonymous Method Injection Vulnerability."

Key facts

CVSS score: 9.3 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-94
EPSS score: 20.6% (98th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-3071)
Published: July 10, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-3071 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / .net framework
microsoft / .net framework
microsoft / .net framework
microsoft / .net framework
microsoft / .net framework

References

http://www.us-cert.gov/ncas/alerts/TA13-190A(Third Party Advisory, US Government Resource)
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-052
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17421

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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