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."
Published Oct 14, 2009
9.3
HIGHCVSS 2.0
EPSS 25.81%
Description
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."
Affected products
No data.
Configuration 1
- n/a
- 1.1
- 2.0
- 2.0
Configuration 2
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- 1.1
- 2.0
- 2.0
- 3.5
- 3.5
Configuration 3
- n/a
- n/a
- n/a
- n/a
- 1.1
- 2.0
- 2.0
- 2.0
- 3.5
- 3.5
Configuration 4
- 1.1
- n/a
- n/a
- n/a
Configuration 5
- 1.0
- 1.1
- 2.0
- 2.0
- 3.5
- 3.5
- n/a
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (36 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 25.81% (0.25811) | 97.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 25.81% (0.25811) | 97.70th | v5 (v2026.06.15) |
| May 2, 2026 | 38.21% (0.38215) | 97.25th | v4 (v2025.03.14) |
| Mar 5, 2026 | 42.01% (0.42007) | 97.36th | v4 (v2025.03.14) |
| Dec 28, 2025 | 44.52% (0.44520) | 97.43th | v4 (v2025.03.14) |
| Dec 27, 2025 | 37.31% (0.37310) | 97.05th | v4 (v2025.03.14) |
| Oct 28, 2025 | 44.52% (0.44520) | 97.40th | v4 (v2025.03.14) |
| Oct 27, 2025 | 37.31% (0.37310) | 97.00th | v4 (v2025.03.14) |
| Oct 1, 2025 | 44.52% (0.44520) | 97.49th | v4 (v2025.03.14) |
| Jul 2, 2025 | 37.31% (0.37310) | 97.01th | v4 (v2025.03.14) |
| Mar 30, 2025 | 56.69% (0.56695) | 97.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 68.13% (0.68133) | 98.07th | v4 (v2025.03.14) |
| Mar 17, 2025 | 56.69% (0.56695) | 97.90th | v4 (v2025.03.14) |
| Feb 10, 2025 | 56.46% (0.56458) | 97.87th | v3 (v2023.03.01) |
| Jan 7, 2025 | 59.12% (0.59119) | 97.90th | v3 (v2023.03.01) |
| Dec 17, 2024 | 62.48% (0.62480) | 97.98th | v3 (v2023.03.01) |
| Dec 12, 2024 | 51.24% (0.51237) | 97.68th | v3 (v2023.03.01) |
| Sep 20, 2024 | 50.82% (0.50822) | 97.58th | v3 (v2023.03.01) |
| Apr 13, 2024 | 58.35% (0.58350) | 97.68th | v3 (v2023.03.01) |
| Mar 2, 2024 | 69.51% (0.69513) | 97.91th | v3 (v2023.03.01) |
| Jan 17, 2024 | 63.08% (0.63078) | 97.56th | v3 (v2023.03.01) |
| Dec 2, 2023 | 65.31% (0.65306) | 97.57th | v3 (v2023.03.01) |
| Oct 17, 2023 | 54.64% (0.54638) | 97.24th | v3 (v2023.03.01) |
| Sep 2, 2023 | 58.35% (0.58350) | 97.29th | v3 (v2023.03.01) |
| Jul 20, 2023 | 55.78% (0.55779) | 97.18th | v3 (v2023.03.01) |
| Jun 7, 2023 | 48.13% (0.48127) | 96.94th | v3 (v2023.03.01) |
| Mar 12, 2023 | 36.66% (0.36659) | 96.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 36.17% (0.36174) | 96.47th | v3 (v2023.03.01) |
| Mar 6, 2023 | 25.01% (0.25012) | 96.87th | v2 (v2022.01.01) |
| Jan 14, 2023 | 25.01% (0.25012) | 96.80th | v2 (v2022.01.01) |
| Nov 12, 2022 | 29.24% (0.29241) | 97.23th | v2 (v2022.01.01) |
| Sep 8, 2022 | 31.56% (0.31559) | 97.48th | v2 (v2022.01.01) |
| Jul 18, 2022 | 35.64% (0.35639) | 97.75th | v2 (v2022.01.01) |
| Jul 17, 2022 | 6.31% (0.06309) | 90.50th | v2 (v2022.01.01) |
| Feb 20, 2022 | 35.64% (0.35639) | 96.95th | v2 (v2022.01.01) |
| Feb 4, 2022 | 37.48% (0.37483) | 97.11th | v2 (v2022.01.01) |
References (3)
- http://www.us-cert.gov/cas/techalerts/TA09-286A.html third-party-advisoryx_refsource_CERTUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-061 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6451 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://www.us-cert.gov/cas/techalerts/TA09-286A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-061 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6451 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.