CVE-2026-96925

Analyzed Analyzed - Analysis Complete

Integer Underflow in Windows NTFS Discloses Information

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Integer underflow (wrap or wraparound) in Windows NTFS allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
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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-2026-96925

EUVD

EUVD-2026-100250

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_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (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-191	The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Attack-Flow Graph

Executive Summary

This is an integer underflow vulnerability in Windows NTFS that allows an authorized attacker to disclose information locally. It occurs when an integer operation results in a value too small to be represented, causing it to wrap around to a large number.

Detection Guidance

This vulnerability involves an integer underflow in Windows NTFS that allows local information disclosure. Detection typically requires monitoring for unusual NTFS operations or system behavior. Use Windows Event Viewer to check for NTFS-related errors or security logs. Microsoft Defender ATP or similar EDR tools can detect anomalous NTFS activity. No specific commands are provided in the available resources.

Impact Analysis

An attacker with local access could exploit this to read sensitive information from the system. This may include files or data they are not authorized to access, potentially leading to data breaches or unauthorized disclosure of confidential information.

Compliance Impact

This vulnerability could lead to unauthorized information disclosure, violating data protection requirements under GDPR and HIPAA. Organizations may face compliance penalties if exploited, as it undermines confidentiality controls required by these regulations.

Mitigation Strategies

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

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