CVE-2026-32216 — Windows Redirected Drive Buffering System Denial of Service Vulnerability

Executive Summary

Null pointer dereference in Windows Redirected Drive Buffering allows an authorized attacker to deny service locally.

Overview

5.5

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Denial of Service

Weakness CWE-476: NULL Pointer Dereference

Released Apr 14 2026

Last Updated Apr 14 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00366 — 0.29628 percentile

NVD CVSS 5.5 MEDIUM — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

None

INTEGRITY

None

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 4.8

EPSS Score

0.00366

probability of exploitation in the next 30 days

0.29628 percentile - updated 2026-08-14

View on FIRST.org

Affected Products

2 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 11 Version 26H1 for ARM64-based Systems	`5083768 (Security Update)`	Important	Denial of Service	Yes
Windows 11 version 26H1 for x64-based Systems	`5083768 (Security Update)`	Important	Denial of Service	Yes

Patches

1 patch

Article	Type	Restart
`5083768`	Security Update	Yes

Exploits & PoC

No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.

Detection Rules

No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.

Acknowledgments

Erik Egsgard
Xinyu Yu with Tsinghua University
Shuqiao Zhang
ziiiro

References

MSRC Advisory MITRE NVD