OnlyFm252
Windows Network File System

CVE-2022-26937 — Windows Network File System Remote Code Execution Vulnerability

Critical CVSS 9.8 EPSS 0.76766 2022-05 archive

Executive Summary

None

Overview

9.8
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Remote Code Execution
Released May 10 2022
Last Updated May 10 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.76766 — 0.99486 percentile
NVD CVSS 9.8 CRITICAL — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.5

EPSS Score

0.76766
probability of exploitation in the next 30 days
0.99486 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 5014010 (Monthly Rollup) 5014006 (Security Only) Critical Remote Code Execution 5012658 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21481 Yes 5014010 5014006 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5014010 (Monthly Rollup) 5014006 (Security Only) Critical Remote Code Execution 5012658 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21481 Yes 5014010 5014006 Windows Server 2008 for x64-based Systems Service Pack 2 5014010 (Monthly Rollup) 5014006 (Security Only) Critical Remote Code Execution 5012658 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21481 Yes 5014010 5014006 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5014010 (Monthly Rollup) 5014006 (Security Only) Critical Remote Code Execution 5012658 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21481 Yes 5014010 5014006 Windows Server 2008 R2 for x64-based Systems Service Pack 1 5014012 (Monthly Rollup) 5013999 (Security Only) Critical Remote Code Execution 5012626 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.25954 Yes 5014012 5013999 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5014012 (Monthly Rollup) 5013999 (Security Only) Critical Remote Code Execution 5012626 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.25954 Yes 5014012 5013999 Windows Server 2012 5014017 (Monthly Rollup) 5014018 (Security Only) Critical Remote Code Execution 5012650 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.23714 Yes 5014017 5014018 Windows Server 2012 (Server Core installation) 5014017 (Monthly Rollup) 5014018 (Security Only) Critical Remote Code Execution 5012650 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.23714 Yes 5014017 5014018 Windows Server 2012 R2 5014011 (Monthly Rollup) 5014001 (Security Only) Critical Remote Code Execution 5012670 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20371 6.3.9600.20365 Yes 5014011 5014001 Windows Server 2012 R2 (Server Core installation) 5014011 (Monthly Rollup) 5014001 (Security Only) Critical Remote Code Execution 5012670 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20371 6.3.9600.20365 Yes 5014011 5014001 Windows Server 2016 5013952 (Security Update) Critical Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 5013952 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 5013941 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 5013941 (Security Update) Critical Remote Code Execution Yes
Windows Server 2022 5013944 (Security Update) Critical Remote Code Execution Yes
Windows Server 2022 (Server Core installation) 5013944 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 20H2 (Server Core Installation) 5013942 (Security Update) Critical Remote Code Execution Yes

Patches

4 patches
Article Type Restart
5013952 Security Update Yes
5013941 Security Update Yes
5013944 Security Update Yes
5013942 Security Update Yes

Known Exploits

Acknowledgments

Yuki Chen

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