CVE-2025-59186

Local information disclosure through undisclosed kernel flaw

Published Oct 14, 2025 · Updated Feb 22, 2026

Information disclosure in the Windows Kernel in affected Windows Server builds allows local users to read sensitive kernel data. Microsoft has not published the vulnerable kernel locus or the operation that returns sensitive data. A local low-privilege account is required, and the documented consequence is disclosure only, with no integrity or service impact.

CVSS severity5.5
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in the Windows Kernel in affected Windows Server builds allows local users to read sensitive kernel data. Microsoft has not published the vulnerable kernel locus or the operation that returns sensitive data. A local low-privilege account is required, and the documented consequence is disclosure only, with no integrity or service impact.

The record

CVE
CVE-2025-59186
Published
Oct 14, 2025
Updated
Feb 22, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-200
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=10.0.17763.0 <10.0.17763.7919

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.7919
Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.6899
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.8519
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1913
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.8519
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.7919
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.4294
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.6899

Published CVSS scores

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

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-200Exposure of Sensitive Information to an Unauthorized Actor

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo