CVE-2026-83788
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Buffer Over-Read in Windows RNDIS via Physical Access

Vulnerability report for CVE-2026-83788, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-13

Last updated on: 2026-10-29

Assigner: Microsoft Corporation

Description

Buffer over-read in Windows RNDIS allows an unauthorized attacker to disclose information with a physical attack.

CVSS Scores

EPSS Scores

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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
EUVD

Affected Vendors & Products

Showing 26 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_server_2022 to 10.0.20348.5761 (exc)
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_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
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KEV
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CWE ID Description
CWE-126 The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is a buffer over-read in Windows RNDIS (Remote Network Driver Interface Specification). It allows an unauthorized attacker to read beyond the intended memory buffer during a physical attack, potentially exposing sensitive information.

Detection Guidance

This vulnerability requires physical access to exploit. Detection involves checking for unauthorized physical connections or unusual network activity on affected Windows systems. Monitor RNDIS drivers and network interfaces for anomalies. Use system logs to track physical device connections.

Impact Analysis

An attacker with physical access could exploit this to disclose confidential data from the system. The impact is limited to information exposure and does not allow code execution or system modification.

Compliance Impact

This vulnerability allows unauthorized disclosure of information through a physical attack, which could lead to unauthorized access to sensitive data. This may violate data protection requirements under GDPR and HIPAA, as both standards mandate protection against unauthorized data disclosure and require safeguards for personal and health information.

Mitigation Strategies

Restrict physical access to systems. Disable unused RNDIS interfaces. Apply Microsoft security updates immediately. Monitor network traffic for suspicious activity. Ensure all Windows systems are updated to the latest version.

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