7.8

CVE-2023-21808: microsoft microsoft .net framework 3.5 and 4.6.2 Use After Free

CVSS: 7.8v3.1HighModified
AliasesGHSA-824j-wqm8-89mjBIT-dotnet-2023-21808BIT-dotnet-sdk-2023-21808
Published 14-02-2023Last modified 19-08-2026
Open JSON

Vulnerability summary

CVE-2023-21808 is a high (CVSS 7.8) Use After Free vulnerability in microsoft microsoft .net framework 3.5 and 4.6.2. EPSS estimates a 1.15% chance of exploitation in the next 30 days, higher than 66.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
1.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-02-2023
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    Last modifiedVulnerability information updated.

Description

.NET and Visual Studio Remote Code Execution Vulnerability

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

1.15%

Chance of exploitation in the next 30 days

Percentile

66%

Versus all other CVEs

30-day change

0.00 pp

From 1.15% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft22 products
NuGet4 products
  • Microsoft.NETCore.App.Runtime.win-arm≥ 7.0.0, < 7.0.3 | ≥ 6.0.0, < 6.0.14
  • Microsoft.NETCore.App.Runtime.win-arm64≥ 7.0.0, < 7.0.3 | ≥ 6.0.0, < 6.0.14
  • Microsoft.NETCore.App.Runtime.win-x64≥ 7.0.0, < 7.0.3 | ≥ 6.0.0, < 6.0.14
  • Microsoft.NETCore.App.Runtime.win-x86≥ 7.0.0, < 7.0.3 | ≥ 6.0.0, < 6.0.14

2 vendors · 26 products

References

4 links