Vulnerability in Microsoft .Net Framework 3.0
CVE-2020-1066
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.025 · change: +0.001
Affected products
- Microsoft .Net Framework 3.0 — versions Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
- Microsoft .Net Framework 3.0 Service Pack 2
- Microsoft .Net Framework 3.5.1 — versions Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1
- Microsoft .Net Framework — versions 3.0, 3.5.1
- Microsoft Windows 7
- Microsoft Windows Server 2008 — versions r2
Public proof-of-concept exploits
References
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2020-1066?
- CVE-2020-1066 is a high-severity vulnerability in Microsoft .Net Framework 3.0. CVSS score: 7.8/10. Published 2020-05-21.
- How severe is CVE-2020-1066?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-1066 known to be exploited?
- 40 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.