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EPSS 0.9%top 43%

CVE-2026-45639: CWE-125: Out-of-bounds Read in Microsoft Remote Desktop client for Windows Desktop

0
High
VulnerabilityCVE-2026-45639cvecve-2026-45639cwe-125gcve
Published: 06/09/2026 (06/09/2026, 17:04:49 UTC)
Source: CVE Database V5
Vendor/Project: Microsoft
Product: Remote Desktop client for Windows Desktop

Description

Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

CVSS v3.1

Score 7.5high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Affected software

Microsoft

Remote Desktop client for Windows Desktop

Affected versions
>=1.2.0.0 <1.2.7214.0

Microsoft

Windows 10 Version 1607

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows 10 Version 1809

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows 10 Version 21H2

Affected versions
>=10.0.19044.0 <10.0.19044.7417

Microsoft

Windows 10 Version 22H2

Affected versions
>=10.0.19045.0 <10.0.19045.7417

Microsoft

Windows 11 version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 24H2

Affected versions
>=10.0.26100.0 <10.0.26100.8655

Microsoft

Windows 11 Version 25H2

Affected versions
>=10.0.26200.0 <10.0.26200.8655

Microsoft

Windows 11 version 26H1

Affected versions
>=10.0.28000.0 <10.0.28000.2269

Microsoft

Windows App Client for Windows Desktop

Affected versions
>=1.00 <2.0.1193.0

Microsoft

Windows Server 2012

Affected versions
>=6.2.9200.0 <6.2.9200.26132

Microsoft

Windows Server 2012 (Server Core installation)

Affected versions
>=6.2.9200.0 <6.2.9200.26132

Microsoft

Windows Server 2012 R2

Affected versions
>=6.3.9600.0 <6.3.9600.23228

Microsoft

Windows Server 2012 R2 (Server Core installation)

Affected versions
>=6.3.9600.0 <6.3.9600.23228

Microsoft

Windows Server 2016

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows Server 2016 (Server Core installation)

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows Server 2019

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows Server 2019 (Server Core installation)

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows Server 2022

Affected versions
>=10.0.20348.0 <10.0.20348.5256

Microsoft

Windows Server 2025

Affected versions
>=10.0.26100.0 <10.0.26100.32995

Microsoft

Windows Server 2025 (Server Core installation)

Affected versions
>=10.0.26100.0 <10.0.26100.32995

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/14/2026, 13:43:24 UTC

Technical Analysis

This vulnerability, identified as CWE-125, involves an out-of-bounds read in the Windows Remote Desktop Protocol (RDP) client. Exploitation could lead to unauthorized information disclosure over a network. The CVSS 3.1 base score is 7.5, reflecting a high impact on confidentiality with no impact on integrity or availability. The vulnerability affects version 1.2.0.0 of the Remote Desktop client. Microsoft has published an official fix to remediate this issue.

Potential Impact

An attacker can remotely exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information. There is no impact on system integrity or availability. No known exploits are currently in the wild.

Mitigation Recommendations

An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45639 to remediate this vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
microsoft
Date Reserved
2026-05-12T20:33:35.156Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
official-fix
Vendor Advisory Urls
[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45639","vendor":"Microsoft"}]

Threat ID: 6a284ce78dd33fbd85664ecc

Added to database: 06/09/2026, 17:27:03 UTC

Last enriched: 08/14/2026, 13:43:24 UTC

Last updated: 09/12/2026, 22:01:34 UTC

Views: 115

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