---
id: CVE-2026-70149
title: >-
  Exposure of sensitive information to an unauthorized actor in Windows Client
  Side Caching driver (csc.sys) allows an authorized attacker to disclose
  information locally.
summary: >-
  Exposure of sensitive information to an unauthorized actor in Windows Client
  Side Caching driver (csc.sys) allows an authorized attacker to disclose
  information locally.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
  - CWE-190
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T22:18:11.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70149'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70149'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:29.013Z'
---

## Overview

Exposure of sensitive information to an unauthorized actor in Windows Client Side Caching driver (csc.sys) allows an authorized attacker to disclose information locally.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.