CVE-2021-26868Known exploitation

Local privilege escalation via graphics memory flaw

Published Mar 11, 2021 · Updated Aug 19, 2026

Windows Graphics Component in Microsoft Windows releases allows local users to elevate privileges through a memory-buffer flaw. The component mishandles bounds for crafted graphics data, corrupting kernel memory and enabling privileged code execution. Exploitation requires local low-privilege access; impact can include loss of confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability3.05%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Windows Graphics Component in Microsoft Windows releases allows local users to elevate privileges through a memory-buffer flaw. The component mishandles bounds for crafted graphics data, corrupting kernel memory and enabling privileged code execution. Exploitation requires local low-privilege access; impact can include loss of confidentiality, integrity, and availability.

The record

CVE
CVE-2021-26868
Published
Mar 11, 2021
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-119, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record 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 <10.0.10240.18874

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.18874
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.1817
Microsoft · Windows 10 Version 1909version=10.0.0 <10.0.18363.1440
Microsoft · Windows 10 Version 1803version=10.0.0 <10.0.17134.2087
Microsoft · Windows 8.1version=6.3.0 <6.3.9600.19968
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.4283
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.23298
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.23298
Microsoft · Windows Server, version 2004version=10.0.0 <10.0.19043.867
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.4283
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19043.867
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.19968
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.1817
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19043.867
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.4283
Microsoft · Windows 10 Version 2004version=10.0.0 <10.0.19043.867
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.1817; version=10.0.17763.0 <10.0.17763.1817
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.19968
Microsoft · Windows Server, version 1909 (Server Core installation)version=10.0.0 <10.0.18363.1440

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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)
Vectorlocal
Privilegesauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1068Exploitation for Privilege Escalation

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.

Reported exploitation

Technologies

Your stack

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Your stack

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