CVE-2026-85921

CVE Enrichment

CVSS: 8.2 HIGH
EPSS: 0.35%
EPSS Percentile: 26.48%
CISA KEV: Not listed

Description

Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: secure@microsoft.com
Published: 15-Sep-2026 01:20
Last Modified: 30-Sep-2026 02:24
EPSS Date: 2026-10-11
CWE: CWE-415

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:H /
                            UI:N /
                            S:C /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

microsoft / windows_11_26h1
Version / affected range: * · before (exclusive) 10.0.28000.2956
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
microsoft / windows_11_26h1
Version / affected range: * · before (exclusive) 10.0.28000.2956
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*

References

secure@microsoft.com

Last enrichment sync: 12-Oct-2026 16:30
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

The Windows 11 update counts as a security update because it covers CVE-2026-62721 and the Windows 11 26H1 also fixes CVE-2026-85921. October 2026 Patch Tuesday Forecast: Office Update Issues and Security Fixes

CVE (4)

Vendors (2)

Products (14)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.