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CVE-2026-42993

nvd nist
Published: Jun 9, 2026Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitability: 1.6 / Impact: 5.9
Source: secure@microsoft.com (Secondary)

Description

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

Affected (16)

Microsoft
8 products
Windows 10 21h2
Windows 10 22h2
Windows 11 23h2
Windows 11 24h2
Windows 11 25h2
Windows 11 26h1
Windows Server 2022
Windows Server 2025
Configuration A
16 vulnerable
Vulnerable SoftwareAffected Versions
Microsoft
Windows 10 21h2
Before 10.0.19044.7417
Windows 10 21h2
Before 10.0.19044.7417
Windows 10 21h2
Before 10.0.19044.7417
Microsoft
Windows 10 22h2
Before 10.0.19045.7417
Windows 10 22h2
Before 10.0.19045.7417
Windows 10 22h2
Before 10.0.19045.7417
Microsoft
Windows 11 23h2
Before 10.0.22631.7219
Windows 11 23h2
Before 10.0.22631.7219
Microsoft
Windows 11 24h2
Before 10.0.26100.8655
Windows 11 24h2
Before 10.0.26100.8655
Microsoft
Windows 11 25h2
Before 10.0.26200.8655
Windows 11 25h2
Before 10.0.26200.8655
Microsoft
Windows 11 26h1
Before 10.0.28000.2269
Windows 11 26h1
Before 10.0.28000.2269
Windows Server 2022
Before 10.0.20348.5256
Windows Server 2025
Before 10.0.26100.32995

Related CWEs

CWE-122
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

Source: secure@microsoft.com
Vendor Advisory

Timeline

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