CVE-2026-85921

VendormicrosoftProductwindows 11 26h1DiscoveredSep 14, 2026UpdatedSep 29, 2026

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

CVSS v3.1

8.2 HIGH

EPSS

0.35%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

Intelligence Reports2

2 intelligence reports available

Curated threat research and citations from CrowdStrike, Mandiant, Microsoft, and other sources — unlock with Premium.

EPSS Trend

Sep 16, 2026 → Oct 2, 2026

▲ 0.09pp

0.26% → 0.35% over 3 tracked changes

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

ScopeCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityHIGH

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

Connections

5 relationships

Timeline

disclosure → media coverage

Sep 14, 2026

Disclosure — published as a CVE record. · last revised by NVD Sep 29, 2026

Sep 17, 2026

itmedia.co.jp reports: Windows 11、RDSやHyper-V、USB音声の不具合に対応するプログラムを配信　一部未解決の問題も

Sep 18, 2026

securityweek.com reports: Microsoft Patches 18 Vulnerabilities in AI, Cloud Products

Sep 18, 2026

thehackernews.com reports: Microsoft Patches CVSS 10.0 Azure AI Foundry Flaw Enabling Unauthorized Privilege Escalation