Integer overflow in Microsoft Windows and Windows Server - CVE-2026-44803
Published: June 12, 2026
Vulnerability identifier: #VU134439
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44803
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in Windows Graphics Component. A remote attacker can trick a victim to open a specially crafted file, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-44803
Install updates from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7417, 10 22H2 10.0.19045.7417, 10 1607 10.0.14393.9234, 10 1809 10.0.17763.8880, 11 23H2 10.0.22631.7219, 11 24H2 10.0.26100.8655, 11 25H2 10.0.26200.8655, 11 26H1 10.0.28000.2269
Windows Server - addressed in versions 2012 R2 6.3.9600.23228, 2012 6.2.9200.26132, 2016 10.0.14393.9234, 2019 10.0.17763.8880, 2022 10.0.20348.5256, 2025 10.0.26100.8655, 2025 10.0.26100.32995
Windows Server - addressed in versions 2012 R2 6.3.9600.23228, 2012 6.2.9200.26132, 2016 10.0.14393.9234, 2019 10.0.17763.8880, 2022 10.0.20348.5256, 2025 10.0.26100.8655, 2025 10.0.26100.32995