CVE-2026-83910

Analyzed Analyzed - Analysis Complete

Out-of-bounds Write in RPC Runtime

Publication date: 2026-10-13

Last updated on: 2026-10-29

Assigner: Microsoft Corporation

Description

Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-29

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-83910

EUVD

EUVD-2026-100047

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_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (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-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds write vulnerability in the RPC Runtime component of Microsoft Windows. It allows an unauthorized attacker to execute arbitrary code remotely over a network without needing authentication or user interaction.

Detection Guidance

Detection typically involves monitoring for unusual RPC activity or out-of-bounds memory access. Use Windows Event Viewer to check for RPC-related errors or crashes. Enable extended logging for RPC services via Group Policy. Network monitoring tools like Wireshark can inspect RPC traffic for anomalies. Microsoft Defender for Endpoint may detect exploitation attempts.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially taking control of it, installing malware, stealing data, or causing system damage. The high CVSS score indicates severe impact.

Compliance Impact

This vulnerability allows remote code execution via an out-of-bounds write in RPC Runtime, which could lead to unauthorized access to sensitive data. This may violate GDPR's data protection requirements and HIPAA's security rules for protected health information if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the RPC Runtime vulnerability. Monitor Microsoft's update guide for CVE-2026-83910 for specific patches.

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EPSS Chart

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