CVE-2020-1066
HighCVSS 7.8Exploitation Probability (EPSS)
High risk82th percentile - higher than 82% of all known CVEs
Summary
An elevation of privilege vulnerability in .NET Framework 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.
Risk Assessment
The risk to the organization is the potential for an unauthorized user to gain control of the system, leading to confidentiality and integrity breaches.
Recommendation
It is recommended to apply the security update provided by the vendor for .NET Framework immediately.
Other vulnerabilities in .NET Framework
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Microsoft .NET Framework versions 4.6, 4.6.1, 4.6.2, and 4.7 allow an attacker to send specially crafted requests to a .NET web application, resulting in denial of service.
- CVE-2017-0160High
Microsoft .NET Framework versions 2.0, 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 allows an attacker with access to the local system to execute malicious code, known as '.NET Remote Code Execution Vulnerability.'
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The Data Provider for SQL Server in Microsoft .NET Framework 4.6.2 mishandles a developer-supplied key, allowing remote attackers to bypass the Always Encrypted protection mechanism and obtain sensitive cleartext information.
- CVE-2016-0033High
Microsoft .NET Framework versions 2.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, and 4.6.1 does not prevent recursive compilation of XSLT transforms, allowing remote attackers to cause a denial of service via crafted XSLT data.
- CVE-2014-4121High
Microsoft .NET Framework versions 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 improperly parse internationalized resource identifiers, allowing remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted request to a .NET web application.
- CVE-2014-4073High
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- CVE-2014-1806High
The .NET Remoting implementation in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5, 3.5.1, 4, 4.5, and 4.5.1 does not properly restrict memory access, allowing remote attackers to execute arbitrary code via malformed objects.
- CVE-2016-0132Critical
Microsoft .NET Framework versions 2.0 SP2, 3.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, and 4.6.1 mishandle signature validation for unspecified elements of XML documents, allowing remote attackers to spoof signatures via a modified document.
- CVE-2026-65810High
Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.
- CVE-2026-62897High
Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to execute code locally.
Original NVD description (English source)
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.