Windows Remote Procedure Call Runtime
CVE-2021-40460 — Windows Remote Procedure Call Runtime Security Feature Bypass Vulnerability
Executive Summary
None
Overview
6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.7
EPSS Score
0.01521
probability of exploitation in the next 30 days
0.71306 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
29 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 5006675 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 for x64-based Systems | 5006675 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 5006669 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1607 for x64-based Systems | 5006669 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 5006672 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 5006672 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1809 for x64-based Systems | 5006672 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1909 for 32-bit Systems | 5006667 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1909 for ARM64-based Systems | 5006667 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 1909 for x64-based Systems | 5006667 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 2004 for 32-bit Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 2004 for ARM64-based Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 2004 for x64-based Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 20H2 for 32-bit Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 20H2 for ARM64-based Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 21H1 for 32-bit Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 21H1 for ARM64-based Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 10 Version 21H1 for x64-based Systems | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 version 21H2 for ARM64-based Systems | 5006674 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 11 version 21H2 for x64-based Systems | 5006674 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 5006743 (Monthly Rollup) 5006728 (Security Only) Important Security Feature Bypass 5005633 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.1.7601.25740 Yes 5006743 5006728 Windows 7 for x64-based Systems Service Pack 1 5006743 (Monthly Rollup) 5006728 (Security Only) Important Security Feature Bypass 5005633 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.1.7601.25740 Yes 5006743 5006728 Windows 8.1 for 32-bit systems 5006714 (Monthly Rollup) 5006729 (Security Only) Important Security Feature Bypass 5005613 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.3.9600.20144 Yes 5006714 5006729 Windows 8.1 for x64-based systems 5006714 (Monthly Rollup) 5006729 (Security Only) Important Security Feature Bypass 5005613 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.3.9600.20144 Yes 5006714 5006729 Windows RT 8.1 | 5006714 (Monthly Rollup) |
Important | Security Feature Bypass | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 5006743 (Monthly Rollup) 5006728 (Security Only) Important Security Feature Bypass 5005633 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.1.7601.25740 Yes 5006743 5006728 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5006743 (Monthly Rollup) 5006728 (Security Only) Important Security Feature Bypass 5005633 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.1.7601.25740 Yes 5006743 5006728 Windows Server 2012 5006739 (Monthly Rollup) 5006732 (Security Only) Important Security Feature Bypass 5005623 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.2.9200.23490 Yes 5006739 5006732 Windows Server 2012 (Server Core installation) 5006739 (Monthly Rollup) 5006732 (Security Only) Important Security Feature Bypass 5005623 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.2.9200.23490 Yes 5006739 5006732 Windows Server 2012 R2 5006714 (Monthly Rollup) 5006729 (Security Only) Important Security Feature Bypass 5005613 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.3.9600.20144 Yes 5006714 5006729 Windows Server 2012 R2 (Server Core installation) 5006714 (Monthly Rollup) 5006729 (Security Only) Important Security Feature Bypass 5005613 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C 6.3.9600.20144 Yes 5006714 5006729 Windows Server 2016 | 5006669 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2016 (Server Core installation) | 5006669 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2019 | 5006672 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2019 (Server Core installation) | 5006672 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2022 | 5006699 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server 2022 (Server Core installation) | 5006699 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server, version 2004 (Server Core installation) | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
| Windows Server, version 20H2 (Server Core Installation) | 5006670 (Security Update) |
Important | Security Feature Bypass | Yes |
Patches
8 patches
| Article | Type | Restart |
|---|---|---|
5006675 |
Security Update | Yes |
5006669 |
Security Update | Yes |
5006672 |
Security Update | Yes |
5006667 |
Security Update | Yes |
5006670 |
Security Update | Yes |
5006674 |
Security Update | Yes |
5006714 |
Monthly Rollup | Yes |
5006699 |
Security Update | Yes |
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
None
References
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