HIGH
Windows Graphics Component Remote Code Execution Vulnerability
Published May 12, 2026
8.8
HIGHCVSS 3.1
EPSS 0.33%
Description
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.
Affected products
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.9140
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.8755
- Version
-
- Version 10.0.19044.0StatusaffectedConstraints<10.0.19044.7291
- Version
-
- Version 10.0.19045.0StatusaffectedConstraints<10.0.19045.7417
- Version
-
- Version 10.0.22631.0StatusaffectedConstraints<10.0.22631.7219
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.8457
- Version
-
- Version 10.0.26200.0StatusaffectedConstraints<10.0.26200.8457
- Version
-
- Version 10.0.22631.0StatusaffectedConstraints<10.0.22631.7079
- Version
-
- Version 10.0.28000.0StatusaffectedConstraints<10.0.28000.2113
- Version
-
- Version 6.2.9200.0StatusaffectedConstraints<6.2.9200.26079
- Version
-
- Version 6.2.9200.0StatusaffectedConstraints<6.2.9200.26079
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.23181
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.23181
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.9140
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.9140
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.8755
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.8755
- Version
-
- Version 10.0.20348.0StatusaffectedConstraints<10.0.20348.5139
- Version
-
- Version 10.0.25398.0StatusaffectedConstraints<10.0.25398.2330
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.32860
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.32860
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | n/a |
| ||||||
| Microsoft | Windows 10 Version 1809 | n/a |
| ||||||
| Microsoft | Windows 10 Version 21H2 | n/a |
| ||||||
| Microsoft | Windows 10 Version 22H2 | n/a |
| ||||||
| Microsoft | Windows 11 Version 23H2 | n/a |
| ||||||
| Microsoft | Windows 11 Version 24H2 | n/a |
| ||||||
| Microsoft | Windows 11 Version 25H2 | n/a |
| ||||||
| Microsoft | Windows 11 version 23H2 | n/a |
| ||||||
| Microsoft | Windows 11 version 26H1 | n/a |
| ||||||
| Microsoft | Windows Server 2012 | n/a |
| ||||||
| Microsoft | Windows Server 2012 (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2012 R2 | n/a |
| ||||||
| Microsoft | Windows Server 2012 R2 (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2016 | n/a |
| ||||||
| Microsoft | Windows Server 2016 (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2019 | n/a |
| ||||||
| Microsoft | Windows Server 2019 (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2022 | n/a |
| ||||||
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2025 | n/a |
| ||||||
| Microsoft | Windows Server 2025 (Server Core installation) | n/a |
|
OR
- < 10.0.14393.9140
- < 10.0.14393.9140
- < 10.0.17763.8755
- < 10.0.17763.8755
- < 10.0.19044.7291
- < 10.0.19044.7291
- < 10.0.19044.7291
- < 10.0.19045.7291
- < 10.0.19045.7291
- < 10.0.19045.7291
- < 10.0.22631.7079
- < 10.0.22631.7079
- < 10.0.26100.8390
- < 10.0.26100.8390
- < 10.0.26200.8390
- < 10.0.26200.8390
- < 10.0.28000.2113
- < 10.0.28000.2113
- n/a
- r2
- < 10.0.14393.9140
- < 10.0.17763.8755
- < 10.0.20348.5074
- < 10.0.25398.2330
- < 10.0.26100.32772
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (1)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40403 vendor-advisorypatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40403 | vendor-advisorypatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published May 12, 2026
Updated Aug 10, 2026
Reserved Apr 13, 2026
Link CVE-2026-40403
CISA Vulnrichment
Updated May 13, 2026