CVE-2022-21904Network attack vector

Remote heap-memory disclosure via malformed EMF conversion

Published Jan 11, 2022 · Updated Jan 2, 2025

Information disclosure in Windows GDI allows remote attackers to read heap memory through a crafted EMF metafile conversion. The DoSetDIBitsToDevice function passes an invalid size to memcpy while EmfToWmfBits converts an EMR_SETDIBITSTODEVICE record from EMF to WMF. No authentication or user interaction is required when a reachable application processes the metafile, and the result is limited to small portions of process heap memory.

CVSS severity7.5
High
EPSS probability3.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Windows GDI allows remote attackers to read heap memory through a crafted EMF metafile conversion. The DoSetDIBitsToDevice function passes an invalid size to memcpy while EmfToWmfBits converts an EMR_SETDIBITSTODEVICE record from EMF to WMF. No authentication or user interaction is required when a reachable application processes the metafile, and the result is limited to small portions of process heap memory.

The record

CVE
CVE-2022-21904
Published
Jan 11, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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 <10.0.10240.19177

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19177
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.2452
Microsoft · Windows 7version=6.1.0 <6.1.7601.25829
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.1466
Microsoft · Windows 10 Version 1909version=10.0.0 <10.0.18363.2037
Microsoft · Windows 8.1version=6.3.0 <6.3.9600.20246
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.4886
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.23584
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.23584
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.1466
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.4886
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.25829
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.1466
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.25829
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.20246
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.2452
Microsoft · Windows 7 Service Pack 1version=6.1.0 <6.1.7601.25829
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19042.1466
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.4886
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.21349
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.469
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.2452; version=10.0.17763.0 <10.0.17763.2452
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20246
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.21349

Published CVSS scores

7.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/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 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

No sourced classifications are available.

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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