CVE-2026-96300: RPC Endpoint Mapper Service Denial of Service Vulnerability
RPC Endpoint Mapper Service Denial of Service Vulnerability
Other sources
Uncontrolled resource consumption in RPC Endpoint Mapper Service allows an unauthorized attacker to deny service over a network.
— 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 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9612Patch KB5126868
Event History
Frequently Asked Questions
Which systems are in scope for this issue?
The affected software list includes Microsoft Windows 10, Windows 11, and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025.
Does exploitation require authentication or user interaction?
No. The vector indicates network-based exploitation with no privileges required and no user interaction.
What is the expected impact of a successful attack?
A successful attack can deny service by causing uncontrolled resource consumption in the RPC Endpoint Mapper Service. The provided metrics indicate availability impact only, with no stated confidentiality or integrity impact.
How difficult is exploitation expected to be?
The attack complexity is rated high, meaning exploitation requires conditions beyond simply reaching the service over the network.