OnlyFm252
Role: DNS Server

CVE-2022-26822 — Windows DNS Server Remote Code Execution Vulnerability

Important CVSS 6.6 EPSS 0.01788 2022-04 archive

Executive Summary

None

Overview

6.6
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Apr 12 2022
Last Updated Apr 12 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01788 — 0.75477 percentile
NVD CVSS 6.6 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.8

EPSS Score

0.01788
probability of exploitation in the next 30 days
0.75477 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

7 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2008 for 32-bit Systems Service Pack 2 5012658 (Monthly Rollup) 5012632 (Security Only) Important Remote Code Execution 5011534 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011534 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011534 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011534 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011552 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011552 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011535 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011535 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011564 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 Remote Code Execution 5011564 Base: 6.6 Temporal: 5.8 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20337 Yes 5012670 5012639 Windows Server 2016 5012596 (Security Update) Important Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 5012596 (Security Update) Important Remote Code Execution Yes
Windows Server 2019 5012647 (Security Update) Important Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 5012647 (Security Update) Important Remote Code Execution Yes
Windows Server 2022 5012604 (Security Update) Important Remote Code Execution Yes
Windows Server 2022 (Server Core installation) 5012604 (Security Update) Important Remote Code Execution Yes
Windows Server, version 20H2 (Server Core Installation) 5012599 (Security Update) Important Remote Code Execution Yes

Patches

4 patches
Article Type Restart
5012596 Security Update Yes
5012647 Security Update Yes
5012604 Security Update Yes
5012599 Security Update Yes

Known Exploits

Acknowledgments

Yuki Chen

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