Important CVSS 9.8 EPSS 0.02778 2024-01 archive

Executive Summary

None

Overview

9.8
CVSS CRITICAL
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Security Feature Bypass
Released Jan 9 2024
Last Updated Jan 9 2024
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02778 — 0.84497 percentile
NVD CVSS 9.8 CRITICAL — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.2

EPSS Score

0.02778
probability of exploitation in the next 30 days
0.84497 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

67 affected products
Product KB Article Severity Impact Restart Required
.NET 6.0 5033733 (Security Update) Important Security Feature Bypass Maybe
.NET 7.0 5033734 (Security Update) Important Security Feature Bypass Maybe
.NET 8.0 5033741 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 5034280 (Monthly Rollup) 5034270 (Security Only) Important Security Feature Bypass Base: 9.1 Temporal: 8.2 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C 3.0.50727.8976 Maybe None Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 5034280 (Monthly Rollup) 5034270 (Security Only) Important Security Feature Bypass Base: 9.1 Temporal: 8.2 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C 3.0.50727.8976 Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 5034280 (Monthly Rollup) 5034270 (Security Only) Important Security Feature Bypass Base: 9.1 Temporal: 8.2 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C 3.0.50727.8976 Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 5034280 (Monthly Rollup) 5034270 (Security Only) Important Security Feature Bypass Base: 9.1 Temporal: 8.2 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C 3.0.50727.8976 Maybe None Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1607 for 32-bit Systems 5034119 (Security Update) Important Security Feature Bypass Yes
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1607 for x64-based Systems 5034119 (Security Update) Important Security Feature Bypass Yes
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 5034119 (Security Update) Important Security Feature Bypass Yes
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 (Server Core installation) 5034119 (Security Update) Important Security Feature Bypass Yes
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems 5034274 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems 5034274 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems 5034274 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems 5034275 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems 5034275 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems 5034275 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for ARM64-based Systems 5034276 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for x64-based Systems 5034276 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) 5034273 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 5034272 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation) 5034272 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems 5034274 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems 5034274 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems 5034274 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems 5034275 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems 5034275 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems 5034275 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 21H2 for ARM64-based Systems 5034276 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 21H2 for x64-based Systems 5034276 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for ARM64-based Systems 5033920 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for x64-based Systems 5033920 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems 5033920 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems 5033920 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 5034272 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation) 5034272 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022, 23H2 Edition (Server Core installation) 5034272 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 5034269 (Security Only) Important Security Feature Bypass Maybe
Microsoft .NET Framework 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) 5034269 (Security Only) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 5034278 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) 5034278 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 5034279 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) 5034279 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems 5033910 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems 5033910 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 5034277 (Monthly Rollup) 5034269 (Security Only) Important Security Feature Bypass Base: 9.1 Temporal: 8.2 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C 4.8.04690.02 4.8.04690.01 Maybe None Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5034277 (Monthly Rollup) 5034269 (Security Only) Important Security Feature Bypass Base: 9.1 Temporal: 8.2 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C 4.8.04690.02 4.8.04690.01 Maybe None Microsoft .NET Framework 4.8 on Windows Server 2012 5034278 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) 5034278 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 5034279 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) 5034279 (Monthly Rollup) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows Server 2016 5033910 (Security Update) Important Security Feature Bypass Maybe
Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) 5033910 (Security Update) Important Security Feature Bypass Maybe
Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) Release Notes (Security Update) Important Security Feature Bypass Maybe
Microsoft Visual Studio 2022 version 17.2 Release Notes (Security Update) Important Security Feature Bypass Maybe
Microsoft Visual Studio 2022 version 17.4 Release Notes (Security Update) Important Security Feature Bypass Maybe
Microsoft Visual Studio 2022 version 17.6 Release Notes (Security Update) Important Security Feature Bypass Maybe
Microsoft Visual Studio 2022 version 17.8 Release Notes (Security Update) Important Security Feature Bypass Maybe
NuGet 17.4.0 Release Notes (Security Update) Important Security Feature Bypass Maybe
Nuget 17.6.0 Release Notes (Security Update) Important Security Feature Bypass Maybe
NuGet 17.8.0 Release Notes (Security Update) Important Security Feature Bypass Unknown
NuGet 5.11.0 Release Notes (Security Update) Important Security Feature Bypass Maybe
PowerShell 7.2 Release Notes (Security Update) Important Security Feature Bypass Maybe
PowerShell 7.3 Release Notes (Security Update) Important Security Feature Bypass Maybe
PowerShell 7.4 Release Notes (Security Update) Important Security Feature Bypass Maybe

Patches

15 patches
Article Type Restart
5033733 Security Update Maybe
5033734 Security Update Maybe
5033741 Security Update Maybe
5034119 Security Update Yes
5034273 Security Update Maybe
5034274 Security Update Maybe
5034275 Security Update Maybe
5034276 Security Update Maybe
5034272 Security Update Maybe
5033920 Security Update Maybe
5034269 Security Only Maybe
5034278 Monthly Rollup Maybe
5034279 Monthly Rollup Maybe
5033910 Security Update Maybe
Release Notes Security Update Maybe

Known Exploits

Acknowledgments

Vishal Mishra and Anita Gaud with Microsoft's Azure DevSec Variant Hunt Team and Stav Nir from Microsoft