CVE-2022-26937

highpriority · attend · 67EPSS 0.760 · 100 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · PoC

Likely / severe?

76.0% (100th) EPSS

CVSS 7.5 · high

Is it mine?

71 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-27

Windows Network File System Remote Code Execution Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1msrc_csaf
6.1.7601.25954:Security Only:https://support.microsoft.com/help/5013999
https://support.microsoft.com/help/5013999
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)msrc_csaf
6.1.7601.25954:Security Only:https://support.microsoft.com/help/5013999
https://support.microsoft.com/help/5013999
FixedWindows Server 2008 for 32-bit Systems Service Pack 2msrc_csaf
6.0.6003.21481:Security Only:https://support.microsoft.com/help/5014006
https://support.microsoft.com/help/5014006
FixedWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.21481:Security Only:https://support.microsoft.com/help/5014006
https://support.microsoft.com/help/5014006
FixedWindows Server 2008 for x64-based Systems Service Pack 2msrc_csaf
6.0.6003.21481:Security Only:https://support.microsoft.com/help/5014006
https://support.microsoft.com/help/5014006
FixedWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.21481:Security Only:https://support.microsoft.com/help/5014006
https://support.microsoft.com/help/5014006
FixedWindows Server 2012msrc_csaf
6.2.9200.23714:Monthly Rollup:https://support.microsoft.com/help/5014017
https://support.microsoft.com/help/5014017
FixedWindows Server 2012 (Server Core installation)msrc_csaf
6.2.9200.23714:Monthly Rollup:https://support.microsoft.com/help/5014017
https://support.microsoft.com/help/5014017
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.20365:Security Only:https://support.microsoft.com/help/5014001
https://support.microsoft.com/help/5014001
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.20365:Security Only:https://support.microsoft.com/help/5014001
https://support.microsoft.com/help/5014001
FixedWindows Server 2016msrc_csaf
10.0.14393.5125:Security Update:https://support.microsoft.com/help/5013952
https://support.microsoft.com/help/5013952
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.5125:Security Update:https://support.microsoft.com/help/5013952
https://support.microsoft.com/help/5013952
FixedWindows Server 2019msrc_csaf
10.0.17763.2928:Security Update:https://support.microsoft.com/help/5013941
https://support.microsoft.com/help/5013941
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.2928:Security Update:https://support.microsoft.com/help/5013941
https://support.microsoft.com/help/5013941
FixedWindows Server 2022msrc_csaf
10.0.20348.707:Security Update:https://support.microsoft.com/help/5013944
https://support.microsoft.com/help/5013944
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.707:Security Update:https://support.microsoft.com/help/5013944
https://support.microsoft.com/help/5013944
FixedWindows Server, version 20H2 (Server Core Installation)msrc_csaf
10.0.19042.1706:Security Update:https://support.microsoft.com/help/5013942
https://support.microsoft.com/help/5013942

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

exploits (3)

Public proof-of-concept and weaponised exploit code.

Malwareman007/CVE-2022-26937POC Of CVE-2022-26937PoC · poc_in_github
corelight/CVE-2022-26937A Zeek package to detect CVE-2022-26937, a vulnerability in the Network Lock Manager (NLM) protocol in Windows NFS server.PoC · poc_in_github
omair2084/CVE-2022-26937Windows Network File System Crash PoCPoC · poc_in_github

affected products (71)

Products and version ranges known to be affected.

Microsoft Windows Server 2008 R2 Service Pack 16.1.7601.0 → 6.1.7601.25954enisa_euvdEU
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 → 6.1.7601.25954enisa_euvdEU
Microsoft Windows Server 2008 Service Pack 26.0.6003.0 → 6.0.6003.21481enisa_euvdEU
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 → 6.0.6003.21481enisa_euvdEU
Microsoft Windows Server 20126.2.9200.0 → 6.2.9200.23714enisa_euvdEU
Microsoft Windows Server 2012 (Server Core installation)6.2.9200.0 → 6.2.9200.23714enisa_euvdEU
Microsoft Windows Server 2012 R26.3.9600.0 → 6.3.9600.20371enisa_euvdEU
Microsoft Windows Server 2012 R2 (Server Core installation)6.3.9600.0 → 6.3.9600.20371enisa_euvdEU
Microsoft Windows Server 201610.0.14393.0 → 10.0.14393.5125enisa_euvdEU
Microsoft Windows Server 2016 (Server Core installation)10.0.14393.0 → 10.0.14393.5125enisa_euvdEU
Microsoft Windows Server 201910.0.17763.0 → 10.0.17763.2928enisa_euvdEU
Microsoft Windows Server 2019 (Server Core installation)10.0.17763.0 → 10.0.17763.2928enisa_euvdEU
Microsoft Windows Server 202210.0.20348.0 → 10.0.20348.707enisa_euvdEU
Microsoft Windows Server version 20H210.0.0 → 10.0.19042.1706enisa_euvdEU
Microsoft Corp Windows Server 2008 R2 Service Pack 1all versionsfstec_bduRU
Microsoft Corp Windows Server 2008 R2 Service Pack 1 (Server Core installation)all versionsfstec_bduRU
Microsoft Corp Windows Server 2008 Service Pack 2all versionsfstec_bduRU
Microsoft Corp Windows Server 2008 Service Pack 2 (Server Core Installation)all versionsfstec_bduRU
Microsoft Corp Windows Server 2012all versionsfstec_bduRU
Microsoft Corp Windows Server 2012 (Server Core installation)all versionsfstec_bduRU

showing 20 of 71

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2022-26937Windows Network File System Remote Code Execution Vulnerability2022-05-10csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu msrc_csaf NVD CVE.org MITRE

published 2022-05-10modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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