Is Use After Free affected by CVE-2026-33098?

CVE-2026-33098 is a local privilege escalation vulnerability in Windows Container Isolation FS Filter Driver affecting all supported Windows 10, Windows 11, and Windows Server versions, allowing low-privileged users to achieve SYSTEM-level access.

CVE-2026-33098

EUVD-2026-22619 HIGH

2026-04-14 microsoft

Denial Of Service Use After Free Memory Corruption Microsoft Windows 10 Version 1607 Windows 10 Version 1809 Windows 10 Version 21H2 Windows 10 Version 22H2 Windows 11 Version 22H3 Windows 11 Version 23H2 Windows 11 Version 24H2 Windows 11 Version 25H2 Windows 11 Version 26H1 Windows Server 2016 Windows Server 2016 Server Core Installation Windows Server 2019 Windows Server 2019 Server Core Installation Windows Server 2022 Windows Server 2022 23H2 Edition Server Core Installation Windows Server 2025 Windows Server 2025 Server Core Installation

7.8

CVSS 3.1

Temporal: 6.8

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Apr 14, 2026 - 19:24 vuln.today

DescriptionNVD

Use after free in Windows Container Isolation FS Filter Driver allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in Windows Container Isolation FS Filter Driver affects all supported Windows 10, Windows 11, and Windows Server versions through use-after-free memory corruption. Low-complexity attack requires only low-privileged local access to achieve full system compromise (SYSTEM-level privileges). …

RemediationAI

Within 24 hours: Inventory all Windows 10, Windows 11, and Windows Server systems (including Hyper-V and containerized environments) and identify current patch levels via WSUS, ConfigMgr, or third-party patch management. Within 7 days: Deploy Microsoft security updates for CVE-2026-33098 to all affected systems using phased rollout (dev/test first, then production). …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-33098 vulnerability details – vuln.today

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CVE-2026-33098

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Full analysis requires sign-in

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External POC / Exploit Code