CVE-2026-83713

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Out-of-bounds Read in Windows UDFS Driver

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83713

EUVD

EUVD-2026-99342

Affected Vendors & Products

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

KEV

CWE ID	Description
CWE-497	The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability in the Windows Universal Disk Format File System Driver (UDFS). It allows an authorized attacker with local access to read memory outside the intended buffer, potentially exposing sensitive information.

Detection Guidance

This vulnerability is an out-of-bounds read in the Windows UDFS driver. Detection typically requires monitoring for unusual system behavior or crashes related to the UDFS driver. Use Event Viewer to check for application or system crashes under Windows Logs > System. Look for errors tied to 'udfs.sys' or 'UDFS' in the event logs.

Impact Analysis

An attacker could exploit this to access sensitive data stored in memory on affected Windows systems. Since it requires local access, physical or authenticated remote access is needed. The impact is primarily information disclosure.

Compliance Impact

This vulnerability allows unauthorized local disclosure of information due to an out-of-bounds read in the Windows UDFS driver. This could lead to exposure of sensitive data, potentially violating GDPR's data protection requirements and HIPAA's safeguards for protected health information.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update to patch the UDFS driver vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

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