CVE-2026-83499

high

Insufficient granularity of access control in Windows Server Update Service allows an authorized attacker to elevate privileges locally.

Vendor / product: Microsoft — windows 10 1607

Insufficient granularity of access control in Windows Server Update Service allows an authorized attacker to elevate privileges locally.

CVSS

7.8

7.8 (CVSS v3.1)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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 17:52

NVD status: Analyzed

Last synced 11 hours ago

Verified against the source API 2026-10-28 18:08 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_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

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

NVD CVE API 2.0 — fetched 2026-10-28 18:08 UTC · record ↗