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CVE-2026-44803CriticalRevised 19 Jun

Windows Graphics Component Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

Severity
Critical
CVSS base score
7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
EPSS, next 30 days
0.5%Higher than 37.9% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Exploitation More Likely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Windows Win32K - GRFX
Weakness
CWE-190: Integer Overflow or Wraparound
Issued by
Microsoft
Published
9 Jun 2026 · June 2026
Last revised
19 Jun 2026Microsoft is announcing the availability of the security updates for Microsoft Word, PowerPoint, Excel for Android. Customers running affected Microsoft Office for Android software should install the update for their product to be protected from this vulnerability.

Updates that fix it

10 KBs
KBTypeRestartApplies toOther CVEs
KB5093998 Security Update Required Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems All CVEs in KB5093998
KB5094041 Monthly Rollup Required Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation) All CVEs in KB5094041
KB5094042 Monthly Rollup Required Windows Server 2012, Windows Server 2012 (Server Core installation) All CVEs in KB5094042
KB5094122 Security Update Required Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016 and 1 more All CVEs in KB5094122
KB5094123 Security Update Required Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019 and 1 more All CVEs in KB5094123
KB5094125 Security Update Required Windows Server 2025, Windows Server 2025 (Server Core installation) All CVEs in KB5094125
KB5094126 Security Update Required Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more All CVEs in KB5094126
KB5094127 Security Update Required Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems and 3 more All CVEs in KB5094127
KB5094128 Security Update Required Windows Server 2022, Windows Server 2022 (Server Core installation) All CVEs in KB5094128
KB5095051 Security Update Required Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems All CVEs in KB5095051

Affected products

Apps, ESU, Microsoft Office, Windows
33 affected products
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