CVE-2026-96948

Analyzed Analyzed - Analysis Complete

Information Disclosure in Windows Client Side Caching Driver

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Exposure of sensitive information to an unauthorized actor in Windows Client Side Caching driver (csc.sys) 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

2026-10-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-96948

EUVD

EUVD-2026-100271

Affected Vendors & Products

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

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 vulnerability involves the Windows Client Side Caching driver (csc.sys) exposing sensitive information to unauthorized actors. An authorized attacker could locally disclose this information due to improper access controls.

Detection Guidance

This vulnerability involves information disclosure in the Windows Client Side Caching driver (csc.sys). Detection typically requires monitoring for unauthorized access to sensitive data or unusual activity in the csc.sys driver. Use Windows Event Viewer to check for suspicious events related to csc.sys or unauthorized data access. Additionally, review system logs for any anomalies in file caching operations.

Impact Analysis

An attacker with local access could exploit this to read sensitive data stored or cached by the system, potentially leading to unauthorized information disclosure or further attacks.

Compliance Impact

This vulnerability could lead to non-compliance with data protection regulations like GDPR or HIPAA by allowing unauthorized access to sensitive personal or health information.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the csc.sys driver vulnerability. Ensure all affected Windows versions listed in the CPEs are updated. Monitor Microsoft's security advisories for further guidance and restrict unauthorized access to sensitive data through proper permissions and access controls.

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