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Microsoft Windows

CVE-2020-1467 — Windows Hard Link Elevation of Privilege Vulnerability

Important CVSS 10 EPSS 0.03549 2020-08 archive

Executive Summary

An elevation of privilege vulnerability exists when Windows improperly handles hard links. An attacker who successfully exploited this vulnerability could overwrite a targeted file leading to an elevated status. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows handles hard links.

Overview

10
CVSS CRITICAL
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Aug 11 2020
Last Updated Aug 11 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.03549 — 0.87807 percentile
NVD CVSS 10 CRITICAL — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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
Changed
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.0

EPSS Score

0.03549
probability of exploitation in the next 30 days
0.87807 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

22 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1607 for 32-bit Systems 4571694 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 4571694 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 4565349 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for ARM64-based Systems 4565349 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 4565349 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for 32-bit Systems 4565351 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for ARM64-based Systems 4565351 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for x64-based Systems 4565351 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for 32-bit Systems 4565351 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for ARM64-based Systems 4565351 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for x64-based Systems 4565351 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 2004 for 32-bit Systems 4566782 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 2004 for ARM64-based Systems 4566782 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 2004 for x64-based Systems 4566782 (Security Update) Important Elevation of Privilege Yes
Windows 7 for 32-bit Systems Service Pack 1 4571729 (Monthly Rollup) 4571719 (Security Only) Important Elevation of Privilege 4565524 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571729 4571719 Windows 7 for x64-based Systems Service Pack 1 4571729 (Monthly Rollup) 4571719 (Security Only) Important Elevation of Privilege 4565524 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571729 4571719 Windows 8.1 for 32-bit systems 4571703 (Monthly Rollup) 4571723 (Security Only) Important Elevation of Privilege 4565541 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571703 4571723 Windows 8.1 for x64-based systems 4571703 (Monthly Rollup) 4571723 (Security Only) Important Elevation of Privilege 4565541 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571703 4571723 Windows RT 8.1 4571703 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 4571730 (Monthly Rollup) 4571746 (Security Only) Important Elevation of Privilege 4565536 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4571730 (Monthly Rollup) 4571746 (Security Only) Important Elevation of Privilege 4565536 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 for x64-based Systems Service Pack 2 4571730 (Monthly Rollup) 4571746 (Security Only) Important Elevation of Privilege 4565536 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4571730 (Monthly Rollup) 4571746 (Security Only) Important Elevation of Privilege 4565536 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571730 4571746 Windows Server 2008 R2 for x64-based Systems Service Pack 1 4571729 (Monthly Rollup) 4571719 (Security Only) Important Elevation of Privilege 4565524 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571729 4571719 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4571729 (Monthly Rollup) 4571719 (Security Only) Important Elevation of Privilege 4565524 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571729 4571719 Windows Server 2012 4571736 (Monthly Rollup) 4571702 (Security Only) Important Elevation of Privilege 4565537 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571736 4571702 Windows Server 2012 (Server Core installation) 4571736 (Monthly Rollup) 4571702 (Security Only) Important Elevation of Privilege 4565537 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571736 4571702 Windows Server 2012 R2 4571703 (Monthly Rollup) 4571723 (Security Only) Important Elevation of Privilege 4565541 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571703 4571723 Windows Server 2012 R2 (Server Core installation) 4571703 (Monthly Rollup) 4571723 (Security Only) Important Elevation of Privilege 4565541 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4571703 4571723 Windows Server 2016 4571694 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 4571694 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 4565349 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 4565349 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1903 (Server Core installation) 4565351 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1909 (Server Core installation) 4565351 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 2004 (Server Core installation) 4566782 (Security Update) Important Elevation of Privilege Yes

Patches

5 patches
Article Type Restart
4571694 Security Update Yes
4565349 Security Update Yes
4565351 Security Update Yes
4566782 Security Update Yes
4571703 Monthly Rollup Yes

Known Exploits

Acknowledgments

None

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