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CVE record · 2 sources

CVE-2026-83563

CVSS 7.8

Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

Vendor: Microsoft
Product: Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2
CVSS v3.1: 7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Exposure class: Operating system

Coverage

2

Every item in the archive that references this CVE, highest rank first. Headlines open the publisher.

62

Tenable research Tenable 4h ago

Microsoft’s November 2026 Patch Tuesday addresses 1093 CVEs (CVE-2026-124194)

63 Critical 1029 Important 1 Moderate 0 Low Microsoft addresses 1093 CVEs in the eleventh Patch Tuesday of 2026. Microsoft patched 1093 CVEs in its November 2026 Patch Tuesday release, with 63 rated critical, 1029 rated as…

Exploited CVSS 6.5 Fix available CVE-2026-124194 CVE-2026-118146 CVE-2026-120002+17 more Microsoft
36

CVE NVD 4h ago

Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

CVSS 7.8 CVE-2026-83563 Microsoft