CVE-2026-70033: Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability
Missing release of memory after effective lifetime in Remote Desktop Gateway Service allows an unauthorized attacker to deny service over a network.
Other sources
Windows Remote Desktop Gateway (RD Gateway) Denial of Service 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 6.3.9600.23470Patch KB5126836 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attacker can act remotely over the network without authentication or user interaction. The attack complexity is rated low.
Which systems should be prioritized for review?
Prioritize deployments running the Remote Desktop Gateway service on the listed Microsoft Windows and Windows Server products, especially internet-reachable RD Gateway instances.
What is the expected security impact?
The reported impact is limited to availability: an attacker may be able to deny service. No confidentiality or integrity impact is indicated by the provided CVSS vector.