CVE-2022-41056Network attack vector

Unauthenticated RADIUS service interruption

Published Nov 9, 2022 · Updated Aug 10, 2026

Denial of service in Network Policy Server on affected Microsoft Windows releases allows remote attackers to interrupt RADIUS service. Microsoft has not published the malformed RADIUS message, parser locus, or incorrect processing operation that causes the interruption. Exposure requires NPS to be installed, configured as a RADIUS server or proxy, and reachable over RADIUS; the reported consequence is limited to service availability.

CVSS severity7.5
High
EPSS probability2.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Network Policy Server on affected Microsoft Windows releases allows remote attackers to interrupt RADIUS service. Microsoft has not published the malformed RADIUS message, parser locus, or incorrect processing operation that causes the interruption. Exposure requires NPS to be installed, configured as a RADIUS server or proxy, and reachable over RADIUS; the reported consequence is limited to service availability.

The record

CVE
CVE-2022-41056
Published
Nov 9, 2022
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.10240.0 <10.0.10240.19567

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19567
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3650
Microsoft · Windows 7version=6.1.0 <6.1.7601.26221
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.2251
Microsoft · Windows 8.1version=6.3.0 <6.3.9600.20671
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5501
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.1219
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.23968
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.23968
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.2251
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5501
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26221
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.2251
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26221
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.2251
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.20671
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.3650
Microsoft · Windows 7 Service Pack 1version=6.1.0 <6.1.7601.26221
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.819
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.5501
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.21768
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1249
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.3650; version=10.0.17763.0 <10.0.17763.3650
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20671
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.21768

Published CVSS scores

7.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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