CVE-2023-36404

Kernel-memory disclosure to local low-privileged users

Published Nov 14, 2023 · Updated Oct 8, 2025

Information disclosure in the Windows kernel allows local users with low privileges to read sensitive kernel memory on affected Windows releases. Microsoft identifies improper access control but has not published the specific kernel routine or operation that exposes the memory. Exploitation requires local low-privileged access and no user interaction; the reported consequence is confidentiality loss only, without integrity or service impact.

CVSS severity5.5
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Windows kernel allows local users with low privileges to read sensitive kernel memory on affected Windows releases. Microsoft identifies improper access control but has not published the specific kernel routine or operation that exposes the memory. Exploitation requires local low-privileged access and no user interaction; the reported consequence is confidentiality loss only, without integrity or service impact.

The record

CVE
CVE-2023-36404
Published
Nov 14, 2023
Updated
Oct 8, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-284
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2025Record 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 <10.0.17763.5122

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.5122
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6452
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2600
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19043.3693
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.531
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6452
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.2715
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.3693
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.5122
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.2715
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.2715
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.6452
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2113
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.5122; version=10.0.17763.0 <10.0.17763.5122

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

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-284Improper Access Control

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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