.NET Framework
CVE-2020-1066 — .NET Framework Elevation of Privilege Vulnerability
Executive Summary
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.
Overview
7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
EPSS Score
0.02309
probability of exploitation in the next 30 days
0.81864 percentile - updated 2026-08-14
View on FIRST.org
Exploits & PoC
2 public PoCsUnverified third-party code
Public proof-of-concept repositories aggregated from PoC-in-GitHub. They are not reviewed and may be incomplete, non-functional, or malicious — inspect the code before running anything.
| Repository | Stars | Published | Description |
|---|---|---|---|
| cbwang505/CVE-2020-1066-EXP | 186 | 2020-06-01 | CVE-2020-1066-EXP支持Windows 7和Windows Server 2008 R2操作系统 |
| xyddnljydd/cve-2020-1066 | 1 | 2021-03-07 |
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
ChengBin Wang( @cbwang505
References
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