CVE-2026-83515
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Use of Uninitialized Resource in RPC Runtime Allows Information Disclosure

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Use of uninitialized resource in RPC Runtime allows an unauthorized attacker to disclose information over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-14
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-83515
EUVD
EUVD-2026-99298

Affected Vendors & Products

Showing 21 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2012 6.2.9200.0
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0
Microsoft Windows Server 2012 R2 6.3.9600.0
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-908 The product uses or accesses a resource that has not been initialized.

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Executive Summary

This vulnerability involves the use of an uninitialized resource in the RPC Runtime. An unauthorized attacker could exploit this to disclose information over a network.

Detection Guidance

Detection requires monitoring for unusual network disclosures or RPC runtime anomalies. Check Windows Event Logs for RPC-related errors or unauthorized access attempts. Use network monitoring tools to inspect RPC traffic for unexpected data leaks.

Impact Analysis

An attacker could gain access to sensitive information transmitted over the network. This may lead to data breaches or unauthorized access to confidential data.

Compliance Impact

This vulnerability could result in unauthorized data disclosure, violating GDPR and HIPAA requirements for data protection and confidentiality.

Mitigation Strategies

Apply the latest Windows security updates immediately. Disable unnecessary RPC services if not required. Restrict network access to RPC endpoints using firewalls. Monitor for suspicious activity and isolate affected systems if detected.

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