What is CVE-2026-47652?

CVE-2026-47652 is a high-severity vulnerability in Microsoft Windows_11_23h2, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-06-09.

How severe is CVE-2026-47652?

High severity. CVSS v3 base score is 8.2 out of 10.

Buffer overflow in Microsoft Windows_11_23h2

CVE-2026-47652

Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Microsoft Windows_11_23h2
Microsoft Windows_11_24h2
Microsoft Windows_11_25h2
Microsoft Windows_11_26h1
Microsoft Windows_server_2022
Microsoft Windows_server_2025

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

secure@microsoft.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-47652?: CVE-2026-47652 is a high-severity vulnerability in Microsoft Windows_11_23h2, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-06-09.
How severe is CVE-2026-47652?: High severity. CVSS v3 base score is 8.2 out of 10.