OnlyPatch
.NET Framework

CVE-2021-24111 — .NET Framework Denial of Service Vulnerability

Important CVSS 7.5 EPSS 0.0384 2021-03 archive

Executive Summary

None

Overview

7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Denial of Service
Released Mar 9 2021
Last Updated Mar 9 2021
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0384 — 0.89015 percentile
NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.5

EPSS Score

0.0384
probability of exploitation in the next 30 days
0.89015 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

32 affected products
Product KB Article Severity Impact Restart Required
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 4603005 (Monthly Rollup) 4602961 (Security Only) Important Denial of Service 4598503, 4579980 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603005 4602961 Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 4603005 (Monthly Rollup) 4602961 (Security Only) Important Denial of Service 4598503, 4579980 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603005 4602961 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems 4601318 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems 4601318 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 4601318 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) 4601318 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1 4603004 (Monthly Rollup) Important Denial of Service Maybe
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 4603003 (Monthly Rollup) 4602959 (Security Only) Important Denial of Service 4598501, 4579978 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603003 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) 4603003 (Monthly Rollup) 4602959 (Security Only) Important Denial of Service 4598501, 4579978 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603003 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems 4601354 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for ARM64-based Systems 4601354 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems 4601354 (Security Update) Important Denial of Service Yes
Microsoft .NET Framework 4.7.2 on Windows Server 2019 4601887 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.7.2 on Windows Server 2019 (Server Core installation) 4601887 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems 4601051 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems 4601051 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems 4601054 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems 4601054 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1809 for 32-bit Systems 4601887 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1809 for x64-based Systems 4601887 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1909 for 32-bit Systems 4601056 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1909 for ARM64-based Systems 4601056 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1909 for x64-based Systems 4601056 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 2004 for 32-bit Systems 4601050 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 2004 for ARM64-based Systems 4601050 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 2004 for x64-based Systems 4601050 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 20H2 for 32-bit Systems 4601050 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 20H2 for ARM64-based Systems 4601050 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.8 on Windows RT 8.1 4603004 (Monthly Rollup) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4603002 (Monthly Rollup) 4602958 (Security Only) Important Denial of Service 4598500, 4579977 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603002 4602958 Microsoft .NET Framework 4.8 on Windows Server 2012 4603003 (Monthly Rollup) 4602959 (Security Only) Important Denial of Service 4598501, 4579978 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603003 Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) 4603003 (Monthly Rollup) 4602959 (Security Only) Important Denial of Service 4598501, 4579978 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603003 Microsoft .NET Framework 4.8 on Windows Server 2012 R2 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) 4603004 (Monthly Rollup) 4602960 (Security Only) Important Denial of Service 4598502, 4579979 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C Maybe 4603004 Microsoft .NET Framework 4.8 on Windows Server 2016 4601051 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) 4601051 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server 2019 4601887 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server 2019 (Server Core installation) 4601887 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server, version 1909 (Server Core installation) 4601056 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server, version 2004 (Server Core installation) 4601050 (Security Update) Important Denial of Service Maybe
Microsoft .NET Framework 4.8 on Windows Server, version 20H2 (Server Core Installation) 4601050 (Security Update) Important Denial of Service Maybe

Patches

8 patches
Article Type Restart
4601318 Security Update Yes
4603004 Monthly Rollup Maybe
4601354 Security Update Yes
4601887 Security Update Maybe
4601051 Security Update Maybe
4601054 Security Update Maybe
4601056 Security Update Maybe
4601050 Security Update Maybe

Known Exploits

Acknowledgments

None

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