.NET Framework
CVE-2023-21722 — .NET Framework Denial of Service Vulnerability
Executive Summary
None
Overview
5
CVSS MEDIUM
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:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.4
EPSS Score
0.00917
probability of exploitation in the next 30 days
0.55477 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
45 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 5022734 (Monthly Rollup) 5022786 (Security Only) Important Denial of Service 5018550, 5021094 Base: 5.0 Temporal: 4.4 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 2.0.50727.8966 2.0.04038.05 Maybe 5022734 5022786 Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 5022734 (Monthly Rollup) 5022786 (Security Only) Important Denial of Service 5018550, 5021094 Base: 5.0 Temporal: 4.4 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 2.0.50727.8966 2.0.04038.05 Maybe 5022734 5022786 Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 5022734 (Monthly Rollup) 5022786 (Security Only) Important Denial of Service 5018550, 5021094 Base: 5.0 Temporal: 4.4 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 2.0.50727.8966 2.0.04038.05 Maybe 5022734 5022786 Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 5022734 (Monthly Rollup) 5022786 (Security Only) Important Denial of Service 5018550, 5021094 Base: 5.0 Temporal: 4.4 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 2.0.50727.8966 2.0.04038.05 Maybe 5022734 5022786 Microsoft .NET Framework 3.5 and 4.6.2 on Windows 10 for 32-bit Systems | 5022858 (Security Update) |
Important | Denial of Service | Yes |
| Microsoft .NET Framework 3.5 and 4.6.2 on Windows 10 for x64-based Systems | 5022858 (Security Update) |
Important | Denial of Service | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 5022838 (Security Update) |
Important | Denial of Service | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1607 for x64-based Systems | 5022838 (Security Update) |
Important | Denial of Service | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 | 5022838 (Security Update) |
Important | Denial of Service | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 (Server Core installation) | 5022838 (Security Update) |
Important | Denial of Service | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1607 for 32-bit Systems | 5022503 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1607 for x64-based Systems | 5022503 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 20H2 for 32-bit Systems | 5022727 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 20H2 for ARM64-based Systems | 5022727 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems | 5022728 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems | 5022728 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems | 5022728 (Monthly Rollup) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems | 5022729 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems | 5022729 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems | 5022729 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for ARM64-based Systems | 5022730 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for x64-based Systems | 5022730 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2016 | 5022503 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2016 (Server Core installation) | 5022503 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) | 5022782 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | 5022735 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation) | 5022735 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 20H2 for 32-bit Systems | 5022727 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 20H2 for ARM64-based Systems | 5022727 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems | 5022728 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems | 5022728 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems | 5022728 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems | 5022729 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems | 5022729 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems | 5022729 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 21H2 for ARM64-based Systems | 5022730 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 21H2 for x64-based Systems | 5022730 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for ARM64-based Systems | 5022497 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for x64-based Systems | 5022497 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | 5022735 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation) | 5022735 (Security Update) |
Important | Denial of Service | Maybe |
Patches
11 patches
| Article | Type | Restart |
|---|---|---|
5022858 |
Security Update | Yes |
5022838 |
Security Update | Yes |
5022782 |
Security Update | Maybe |
5022503 |
Security Update | Maybe |
5022727 |
Security Update | Maybe |
5022728 |
Security Update | Maybe |
5022728 |
Monthly Rollup | Maybe |
5022729 |
Security Update | Maybe |
5022730 |
Security Update | Maybe |
5022735 |
Security Update | Maybe |
5022497 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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