CVE-2020-1066: microsoft microsoft .net framework 3.0 service pack 2
Vulnerability summary
CVE-2020-1066 is a high (CVSS 7.8) vulnerability in microsoft microsoft .net framework 3.0 service pack 2. EPSS estimates a 2.52% chance of exploitation in the next 30 days, higher than 84.6% of scored vulnerabilities.
Timeline
- 21-05-2020PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
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 metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
2.52%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
+0.02 pp
From 2.50% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft3 products
- microsoft .net framework 3.0 service pack 2≥ 3.0.0, < publication
- microsoft .net framework 3.5.1≥ 3.5.0, < publication
- .net_framework3.0:sp2 | 3.5.1
1 vendor · 3 products
References
2 links
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066X Refsource MISCX TransferredPatchVendor Advisory