CVE-2026-96300: CWE-770: Allocation of Resources Without Limits or Throttling in Microsoft Windows 10 Version 1607
Description
CVE-2026-96300 is a vulnerability in Microsoft Windows 10 Version 1607 involving uncontrolled resource consumption in the RPC Endpoint Mapper Service. This flaw allows an unauthorized attacker to cause a denial of service over a network by exhausting system resources. The issue affects multiple Windows 10 builds prior to specific patched versions. The vulnerability has a medium severity rating and a CVSS score of 5.9. An official fix is available from Microsoft.
CVSS v3.1
Score 5.9medium
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-96300) concerns an uncontrolled allocation of resources without limits or throttling (CWE-770) in the RPC Endpoint Mapper Service on Microsoft Windows 10 Version 1607 and related builds. An attacker without privileges can exploit this flaw remotely to cause a denial of service by exhausting resources, impacting system availability. The vulnerability affects multiple Windows 10 versions starting from 10.0.14393.0 up to but not including various patched builds (e.g., <10.0.14393.9612, <10.0.17763.9376, <10.0.19044.7807, etc.). Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation results in denial of service (DoS) due to resource exhaustion in the RPC Endpoint Mapper Service. There is no impact on confidentiality or integrity. The attacker does not require privileges or user interaction. The medium severity reflects the service disruption risk.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96300 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-22T22:31:49.521Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96300","vendor":"Microsoft"}]
Threat ID: 6ace85752cdf04f656a00467
Added to database: 10/13/2026, 19:24:37 UTC
Last enriched: 10/14/2026, 00:33:53 UTC
Last updated: 10/14/2026, 00:33:53 UTC
Views: 4
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