PT-2026-47916 · Microsoft · Windows 10 Version 21H2+7

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-42993

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-42993

Affected Products

Windows 10 Version 21H2

Windows 10 Version 22H2

Windows 11 Version 23H2

Windows 11 Version 24H2

Windows 11 Version 25H2

Windows 11 Version 26H1

Windows Server 2022

Windows Server 2025

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-42993 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42993 · Vendor Advisory