Heap-based buffer overflow in Windows and Windows Server - CVE-2026-47652
Published: June 9, 2026
Vulnerability identifier: #VU134023
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-47652
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Hyper-V. A remote administrator can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Windows
Windows Server
Windows Server
How to mitigate CVE-2026-47652
Install updates from vendor's website.
Windows - addressed in versions 10 1607 10.0.14393.9234, 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, 2022 10.0.20348.5256, 2025 10.0.26100.32995
Windows Server - addressed in versions 2012 R2 6.3.9600.23228, 2022 10.0.20348.5256, 2025 10.0.26100.32995