RCE in Microsoft .Net Framework
CVE-2009-0091
Microsoft .NET Framework 2.0, 2.0 SP1, and 3.5 does not properly enforce a certain type-equality constraint in .NET verifiable code, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka "Microsoft .NET Framework Type Verification Vulnerability."
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 9.3 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.258 (97.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.258 · newest: 0.258 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.us-cert.gov/cas/techalerts/TA09-286A.html (US Government Resource, third-party-advisory)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:6451 (signature, vdb-entry)
- docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-061 (vendor-advisory)
Frequently asked questions
- What is CVE-2009-0091?
- CVE-2009-0091 is a vulnerability in Microsoft .Net Framework, classified under Code Injection. Published 2009-10-14.
- Is CVE-2009-0091 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.