CVE-2026-96300

Analyzed Analyzed - Analysis Complete

Uncontrolled Resource Consumption in RPC Endpoint Mapper Service

Publication date: 2026-10-13

Last updated on: 2026-10-20

Assigner: Microsoft Corporation

Description

Uncontrolled resource consumption in RPC Endpoint Mapper Service allows an unauthorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-20

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-96300

EUVD

EUVD-2026-100220

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

This vulnerability involves uncontrolled resource consumption in the RPC Endpoint Mapper Service. An unauthorized attacker can exploit it to deny service over a network by consuming excessive resources.

Detection Guidance

Monitor for unusual network traffic or service degradation on systems running Windows 10/11 or Windows Server. Check RPC Endpoint Mapper Service logs for excessive resource usage or failed connections. Use commands like 'netstat -ano' to identify suspicious network activity or 'tasklist /svc' to inspect running services.

Impact Analysis

This vulnerability can lead to denial of service, causing systems to become unresponsive or crash. It may disrupt network services and affect the availability of affected Windows systems.

Compliance Impact

This vulnerability enables denial-of-service attacks, which could disrupt critical services handling sensitive data. GDPR requires ensuring availability of personal data processing systems, while HIPAA mandates safeguards against service disruptions that could compromise protected health information. Exploitation may violate compliance requirements for availability and security controls.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the RPC Endpoint Mapper Service. Restrict network access to RPC services if possible. Monitor affected systems for signs of exploitation or resource exhaustion.

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EPSS Chart

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