Reference page — cumulative record through Monday, October 5, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-50418

CVE-2026-50418MEDIUM

Microsoft Windows 11 Version 24H2 — Windows System Secure Feature Bypass Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  L  N    6.1   .0027   16.8     —

AFFECTED
  Product                                         Versions        Fixed
  Windows 11 Version 24H2                         10.0.26100.0 –  —
  Windows 11 Version 25H2                         10.0.26200.0 –  —
  Windows 11 version 26H1                         10.0.28000.0 –  —
  Windows Server 2022                             10.0.20348.0 –  —
  Windows Server 2025                             10.0.26100.0 –  —
  Windows Server 2025 (Server Core installation)  10.0.26100.0 –  —

TIMELINE
  Jun 4   Reserved by microsoft
  Jul 14  Published (CNA: microsoft)
  Jul 22  RESCORED — CVE-2026-50418 (Microsoft Windows 11 Version 24H2). CVSS 5.1 → 6.1 (NVD).

CWE-284 · CNA: microsoft · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Improper access control in Windows System allows an unauthorized attacker to bypass a security feature locally.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 4, 2026	Reserved	Reserved by microsoft
July 14, 2026	Published	Published (CNA: microsoft)
July 22, 2026	RESCORED	RESCORED — CVE-2026-50418 (Microsoft Windows 11 Version 24H2). CVSS 5.1 → 6.1 (NVD).

Affected

Affected products and packages — 6 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Windows 11 Version 24H2	—	10.0.26100.0	—
Microsoft	Windows 11 Version 25H2	—	10.0.26200.0	—
Microsoft	Windows 11 version 26H1	—	10.0.28000.0	—
Microsoft	Windows Server 2022	—	10.0.20348.0	—
Microsoft	Windows Server 2025	—	10.0.26100.0	—
Microsoft	Windows Server 2025 (Server Core installation)	—	10.0.26100.0	—

Weaknesses

CWE-284

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50418 [vendor-advisory, patch]

Authoritative record: CVE-2026-50418 at cve.org

Vendors: microsoft

Weaknesses: CWE-284

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-50418 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 5, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.