Use After Free in Microsoft .Net Framework 3.5 And 4.6.2
CVE-2023-21808
.NET and Visual Studio Remote Code Execution Vulnerability
Vulnerability class: Use-After-Free
EPSS: 0.013 (79.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.
Affected products
- Microsoft .Net Framework 3.5 And 4.6.2 — versions 4.7.0
- Microsoft .Net Framework 3.5 And 4.7.2 — versions 4.7.0
- Microsoft .Net Framework 3.5 And 4.8 — versions 4.8.0
- Microsoft .Net Framework 3.5 And 4.8.1 — versions 4.8.1
- Microsoft .Net Framework 4.6.2 — versions 4.7.0
- Microsoft .Net Framework 4.6.2/4.7/4.7.1/4.7.2 — versions 4.7.0
- Microsoft .Net Framework 4.8 — versions 4.8.0
- Microsoft Visual Studio 2013 Update 5 — versions 12.0.0
- Microsoft Visual Studio 2015 Update 3 — versions 14.0.0
- Microsoft Visual Studio 2017 Version 15.9 (Includes 15.0 - 15.8) — versions 15.9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- .NET and Visual Studio Remote Code Execution Vulnerability (vendor-advisory)
Frequently asked questions
- What is CVE-2023-21808?
- CVE-2023-21808 is a high-severity vulnerability in Microsoft .Net Framework 3.5 And 4.6.2, classified under Use After Free. CVSS score: 7.8/10. Published 2023-02-14.
- How severe is CVE-2023-21808?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-21808 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.