CVE-2026-70149
highExposure of sensitive information to an unauthorized actor in Windows Client Side Caching driver (csc.sys) allows an authorized attacker to disclose informatio…
Vendor / product: Microsoft — windows 10 1607
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
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-10-13 19:19
Modified: 2026-10-28 17:10
NVD status: Analyzed
Last synced 13 hours ago
Verified against the source API 2026-10-28 17:38 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / windows_10_1607 <10.0.14393.9612
microsoft / windows_10_1809 <10.0.17763.9376
microsoft / windows_10_21h2 <10.0.19044.7807
microsoft / windows_10_22h2 <10.0.19045.7807
microsoft / windows_11_23h2 <10.0.22631.7652
microsoft / windows_11_24h2 <10.0.26100.9711
microsoft / windows_11_25h2 <10.0.26200.9711
microsoft / windows_11_26h1 <10.0.28000.3231
microsoft / windows_11_26h2 <10.0.26300.9711
microsoft / windows_server_2012 all versions, r2
microsoft / windows_server_2016 <10.0.14393.9612
microsoft / windows_server_2019 <10.0.17763.9376
microsoft / windows_server_2022 <10.0.20348.5761
microsoft / windows_server_2025 <10.0.26100.33650
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70149
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70149
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70149 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 17:38 UTC · record ↗