CVE-2026-45639

Published Jun 9, 2026

Last updated a month ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-45639 is an information disclosure vulnerability affecting the Windows Remote Desktop Protocol (RDP). This flaw stems from an out-of-bounds read condition within the RDP stack. An unauthenticated attacker can exploit this vulnerability remotely over the network without user interaction to read portions of process memory. Successful exploitation could potentially leak sensitive data such as credentials, session tokens, or protocol state data, depending on the contents of the targeted memory region. This vulnerability impacts a wide range of Windows client and server releases where RDP is available, including various versions of Windows 10, Windows 11, and Windows Server. Microsoft addressed CVE-2026-45639 as part of its security updates released on June 9, 2026.

Description
Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
remote_desktop_client, windows_app, windows_10_1607, windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_23h2, windows_11_24h2, windows_11_25h2, windows_11_26h1, windows_server_2012, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2025

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-125

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.