CVE-2026-32216

Local service interruption via null pointer dereference

Published Apr 14, 2026 · Updated Apr 14, 2026

Null pointer dereference in Windows Redirected Drive Buffering in Windows 11 version 26H1 allows local users to interrupt the system. Microsoft identifies the fault within the kernel-mode Redirected Drive Buffering subsystem but has not published the triggering operation or input. Low privileges and local access are required; successful exploitation affects availability only, and the exact failure mode remains undisclosed.

CVSS severity5.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Windows Redirected Drive Buffering in Windows 11 version 26H1 allows local users to interrupt the system. Microsoft identifies the fault within the kernel-mode Redirected Drive Buffering subsystem but has not published the triggering operation or input. Low privileges and local access are required; successful exploitation affects availability only, and the exact failure mode remains undisclosed.

The record

CVE
CVE-2026-32216
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
Microsoft
Product
Windows 11, version 26H1
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.28000.0 <10.0.28000.1836

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 11, version 26H1version=10.0.28000.0 <10.0.28000.1836

Published CVSS scores

5.5Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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