CVE-2026-56647: Windows Remote Access Service Infrastructure Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows Remote Access Service Infrastructure allows an authorized attacker to elevate privileges over a network.
Other sources
Windows Remote Access Service Infrastructure Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23291Patch KB5099444 - Upgrade
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Fixed in 10.0.14393.9339Patch KB5099535 - Upgrade
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Fixed in 10.0.28000.2525Patch KB5101649 - Upgrade
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Fixed in 10.0.26100.8875Patch KB5101650 - Upgrade
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Fixed in 10.0.26100.33158Patch KB5099536 - Upgrade
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Fixed in 10.0.19044.7548Patch KB5099539 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7548Patch KB5099539 - Upgrade
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Fixed in 10.0.17763.9020Patch KB5099538 - Upgrade
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Fixed in 10.0.20348.5386Patch KB5099540 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.8875Patch KB5101650
Event History
Frequently Asked Questions
What level of access does an attacker need before exploiting this issue?
The attacker must already be authorized and have low privileges. Exploitation can be performed over the network and does not require user interaction.
Which Windows systems are identified as affected?
The affected software list includes Microsoft Windows 10, Windows 10 21H2, Windows 10 22H2, Windows 11, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, and Windows Server 2025.
What is the potential impact after successful exploitation?
Successful exploitation may allow elevation of privilege, with high potential impact to confidentiality, integrity, and availability.