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Windows LDAP - Lightweight Directory Access Protocol

CVE-2022-26831 — Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability

Important CVSS 7.5 EPSS 0.02888 2022-04 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 Apr 12 2022
Last Updated Apr 12 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02888 — 0.85068 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

0.02888
probability of exploitation in the next 30 days
0.85068 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

28 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 5012653 (Security Update) Important Denial of Service Yes
Windows 10 for x64-based Systems 5012653 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for 32-bit Systems 5012596 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for x64-based Systems 5012596 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for 32-bit Systems 5012647 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for ARM64-based Systems 5012647 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for x64-based Systems 5012647 (Security Update) Important Denial of Service Yes
Windows 10 Version 1909 for 32-bit Systems 5012591 (Security Update) Important Denial of Service Yes
Windows 10 Version 1909 for ARM64-based Systems 5012591 (Security Update) Important Denial of Service Yes
Windows 10 Version 1909 for x64-based Systems 5012591 (Security Update) Important Denial of Service Yes
Windows 10 Version 20H2 for 32-bit Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 20H2 for ARM64-based Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H1 for 32-bit Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H1 for ARM64-based Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H1 for x64-based Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H2 for 32-bit Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H2 for ARM64-based Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H2 for x64-based Systems 5012599 (Security Update) Important Denial of Service Yes
Windows 11 version 21H2 for ARM64-based Systems 5012592 (Security Update) Important Denial of Service Yes
Windows 11 version 21H2 for x64-based Systems 5012592 (Security Update) Important Denial of Service Yes
Windows 7 for 32-bit Systems Service Pack 1 5012626 (Monthly Rollup) 5012649 (Security Only) Important Denial of Service 5011552 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 6.1.7601.25924 Yes 5012626 5012649 Windows 7 for x64-based Systems Service Pack 1 5012626 (Monthly Rollup) 5012649 (Security Only) Important Denial of Service 5011552 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 6.1.7601.25924 Yes 5012626 5012649 Windows 8.1 for 32-bit systems 5012670 (Monthly Rollup) 5012639 (Security Only) Important Denial of Service 5011564 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 6.3.9600.20337 Yes 5012670 5012639 Windows 8.1 for x64-based systems 5012670 (Monthly Rollup) 5012639 (Security Only) Important Denial of Service 5011564 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 6.3.9600.20337 Yes 5012670 5012639 Windows RT 8.1 5012670 (Monthly Rollup) Important Denial of Service Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5012658 (Monthly Rollup) 5012632 (Security Only) Important Denial of Service 5011534 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 6.0.6003.21446 Yes 5012658 5012632 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5012658 (Monthly Rollup) 5012632 (Security Only) Important Denial of Service 5011534 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 6.0.6003.21446 Yes 5012658 5012632 Windows Server 2008 for x64-based Systems Service Pack 2 5012658 (Monthly Rollup) 5012632 (Security Only) Important Denial of Service 5011534 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 6.0.6003.21446 Yes 5012658 5012632 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5012658 (Monthly Rollup) 5012632 (Security Only) Important Denial of Service 5011534 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 6.0.6003.21446 Yes 5012658 5012632 Windows Server 2008 R2 for x64-based Systems Service Pack 1 5012626 (Monthly Rollup) 5012649 (Security Only) Important Denial of Service 5011552 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 6.1.7601.25924 Yes 5012626 5012649 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5012626 (Monthly Rollup) 5012649 (Security Only) Important Denial of Service 5011552 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 6.1.7601.25924 Yes 5012626 5012649 Windows Server 2012 5012650 (Monthly Rollup) 5012666 (Security Only) Important Denial of Service 5011535 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 6.2.9200.23679 Yes 5012650 5012666 Windows Server 2012 (Server Core installation) 5012650 (Monthly Rollup) 5012666 (Security Only) Important Denial of Service 5011535 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 6.2.9200.23679 Yes 5012650 5012666 Windows Server 2012 R2 5012670 (Monthly Rollup) 5012639 (Security Only) Important Denial of Service 5011564 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 6.3.9600.20337 Yes 5012670 5012639 Windows Server 2012 R2 (Server Core installation) 5012670 (Monthly Rollup) 5012639 (Security Only) Important Denial of Service 5011564 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 6.3.9600.20337 Yes 5012670 5012639 Windows Server 2016 5012596 (Security Update) Important Denial of Service Yes
Windows Server 2016 (Server Core installation) 5012596 (Security Update) Important Denial of Service Yes
Windows Server 2019 5012647 (Security Update) Important Denial of Service Yes
Windows Server 2019 (Server Core installation) 5012647 (Security Update) Important Denial of Service Yes
Windows Server 2022 5012604 (Security Update) Important Denial of Service Yes
Windows Server 2022 (Server Core installation) 5012604 (Security Update) Important Denial of Service Yes
Windows Server, version 20H2 (Server Core Installation) 5012599 (Security Update) Important Denial of Service Yes

Patches

8 patches
Article Type Restart
5012653 Security Update Yes
5012596 Security Update Yes
5012647 Security Update Yes
5012591 Security Update Yes
5012599 Security Update Yes
5012592 Security Update Yes
5012670 Monthly Rollup Yes
5012604 Security Update Yes

Known Exploits

Acknowledgments

Cyber KunLun

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