CVE-2020-1066
mediumpriority · track · 42EPSS 0.025 · 85 %ileexploit · PoCEURUUSEPSS · scored 2026-10-23
An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level. To exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program. The update addresses the vulnerability by correcting how .NET Framework activates COM objects.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–7.8
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (2)
Public proof-of-concept and weaponised exploit code.
- xyddnljydd/cve-2020-1066xyddnljydd/cve-2020-1066PoC · poc_in_github
affected products (10)
Products and version ranges known to be affected.
- Microsoft Microsoft .NET Framework 3.0≤ Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2enisa_euvdEU
- Microsoft Microsoft .NET Framework 3.0≤ Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2enisa_euvdEU
- Microsoft Microsoft .NET Framework 3.5.1≤ Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)enisa_euvdEU
- Microsoft Microsoft .NET Framework 3.5.1≤ Windows 7 for x64-based Systems Service Pack 1enisa_euvdEU
- Microsoft Microsoft .NET Framework 3.5.1≤ Windows Server 2008 R2 for x64-based Systems Service Pack 1enisa_euvdEU
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- http://www.nsfocus.net/vulndb/46720cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-1066cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066cnnvd
- https://portal.msrc.microsoft.com/zh-CN/security-guidance/advisory/CVE-2020-1066cnnvd
- https://vigilance.fr/vulnerability/Microsoft-NET-vulnerabilities-of-May-2020-32245cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066enisa_euvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066nvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066PatchVendor Advisorynvd
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