CVE-2024-21406Network attack vector

Unauthenticated information modification via undisclosed spoofing

Published Feb 13, 2024 · Updated Aug 10, 2026

Spoofing in Microsoft Windows Printing Service allows remote attackers to alter protected information through network requests. Microsoft has not published the affected protocol, request field, or cleartext data flow that enables the spoofing condition. No privileges or user interaction are required; successful exploitation compromises integrity without disclosed confidentiality or availability impact.

CVSS severity7.5
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Spoofing in Microsoft Windows Printing Service allows remote attackers to alter protected information through network requests. Microsoft has not published the affected protocol, request field, or cleartext data flow that enables the spoofing condition. No privileges or user interaction are required; successful exploitation compromises integrity without disclosed confidentiality or availability impact.

The record

CVE
CVE-2024-21406
Published
Feb 13, 2024
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-319
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2024CVE 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 <10.0.10240.20469

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20469
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.5458
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6709
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2777
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24710
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24710
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.4046
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.709
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6709
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.3155
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26961
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26961
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.4046
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.21813
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.5458
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.3155
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.3155
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.6709
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2322
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.5458; version=10.0.17763.0 <10.0.17763.5458
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.21813

Published CVSS scores

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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information

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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