CVE-2026-25184

Local privilege escalation via driver race condition

Published Apr 14, 2026 · Updated Apr 14, 2026

Race condition in applockerfltr.sys in affected Windows 11 and Windows Server builds allows local users to gain elevated privileges. The driver permits concurrent operations on a shared resource without proper synchronization, but Microsoft has not disclosed the raced object or operation. A user with low local privileges must win a high-complexity race; successful exploitation compromises confidentiality, integrity, and availability at the elevated privilege level.

CVSS severity7.0
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in applockerfltr.sys in affected Windows 11 and Windows Server builds allows local users to gain elevated privileges. The driver permits concurrent operations on a shared resource without proper synchronization, but Microsoft has not disclosed the raced object or operation. A user with low local privileges must win a high-complexity race; successful exploitation compromises confidentiality, integrity, and availability at the elevated privilege level.

The record

CVE
CVE-2026-25184
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
Microsoft
Product
Windows Server 2025 (Server Core installation)
Classifications
CWE-362, T1068
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=10.0.26100.0 <10.0.26100.32690

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.32690
Microsoft · Windows 11, version 25H2version=10.0.26200.0 <10.0.26200.8246
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.32690
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.2274
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.6936
Microsoft · Windows 11, version 26H1version=10.0.28000.0 <10.0.28000.1836
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.6936
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.32690

Published CVSS scores

7.0Microsoft CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1068Exploitation for Privilege Escalation

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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