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CVE-2026-96853· NVD / CVE Program· CNA microsoft

Windows Win32 Kernel Subsystem Information Disclosure Vulnerability

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9612; Windows 10 Version 1607 for x64-based Systems 10.0.14393.9612; Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9376.

Low priority for now. Upgrade to Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9612; Windows 10 Version 1607 for x64-based Systems 10.0.14393.9612; Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9376 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Time-of-check time-of-use (toctou) race condition in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Oct 13, 2026
Updated
Oct 20, 2026
EPSS
0.1% · 7th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
4.7
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-96853

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftwindows 10 1607
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 23h2
microsoftwindows 11 24h2
microsoftwindows 11 25h2
microsoftwindows 11 26h1
microsoftwindows 11 26h2
microsoftwindows server 2012
microsoftwindows server 2016
microsoftwindows server 2019

and 2 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows 10 1607before 10.0.14393.9612
  • microsoft windows 10 1809before 10.0.17763.9376
  • microsoft windows 10 21h2before 10.0.19044.7807
  • microsoft windows 10 22h2before 10.0.19045.7807
  • microsoft windows 11 23h2before 10.0.22631.7652
  • microsoft windows 11 24h2before 10.0.26100.9711
  • microsoft windows 11 25h2before 10.0.26200.9711
  • microsoft windows 11 26h1before 10.0.28000.3231
  • microsoft windows 11 26h2before 10.0.26300.9711
  • microsoft windows server 2012all versions
  • microsoft windows server 2012r2
  • microsoft windows server 2016before 10.0.14393.9612
  • microsoft windows server 2019before 10.0.17763.9376
  • microsoft windows server 2022before 10.0.20348.5761
  • microsoft windows server 2025before 10.0.26100.33650

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Windows 10 Version 1607

    • 10.0.14393.0 and later · before 10.0.14393.9612affected

  • Microsoft Windows 10 Version 1809

    • 10.0.17763.0 and later · before 10.0.17763.9376affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19044.0 and later · before 10.0.19044.7807affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.7807affected

  • Microsoft Windows 11 version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.7652affected

  • Microsoft Windows 11 Version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.7652affected

  • Microsoft Windows 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.9711affected

  • Microsoft Windows 11 Version 25H2

    • 10.0.26200.0 and later · before 10.0.26200.9711affected

  • Microsoft Windows 11 version 26H1

    • 10.0.28000.0 and later · before 10.0.28000.3231affected

  • Microsoft Windows 11 Version 26H2

    • 10.0.26300.0 and later · before 10.0.26300.9711affected

  • Microsoft Windows Server 2012

    • 6.2.9200.0 and later · before 6.2.9200.26434affected

  • Microsoft Windows Server 2012 (Server Core installation)

    • 6.2.9200.0 and later · before 6.2.9200.26434affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

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    86Now
  • CVE-2022-44698Windows SmartScreen Security Feature Bypass VulnerabilityKEV
    74This week
  • CVE-2026-21510Windows Shell Security Feature Bypass VulnerabilityKEV
    72This week

Published before and after this one in the same product

  • ← EarlierCVE-2026-96851Oct 13, 2026 · Windows Management Instrumentation Information Disclosure Vulnerability
    22Monitor
  • ← EarlierCVE-2026-96852Oct 13, 2026 · Windows TCP/IP Elevation of Privilege Vulnerability
    28Monitor
  • Later →CVE-2026-96854Oct 13, 2026 · Windows Device Association Service Information Disclosure Vulnerability
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Windows 10 Version 1607 for 32-bit Systems10.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows 10 Version 1607 for x64-based Systems10.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows 10 Version 1809 for 32-bit Systems10.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems10.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems10.0.19044.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems10.0.19044.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems10.0.19044.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems10.0.19045.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems10.0.19045.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems10.0.19045.7807 · KB5126657Microsoft (MSRC)
Windows 11 Version 23H2 for ARM64-based Systems10.0.22631.7652 · KB5126653Microsoft (MSRC)
Windows 11 Version 23H2 for x64-based Systems10.0.22631.7652 · KB5126653Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 25H2 for ARM64-based Systems10.0.26200.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 25H2 for x64-based Systems10.0.26200.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 26H1 for ARM64-based Systems10.0.28000.3231 · KB5127646Microsoft (MSRC)
Windows 11 version 26H1 for x64-based Systems10.0.28000.3231 · KB5127646Microsoft (MSRC)
Windows 11 Version 26H2 for ARM64-based Systems10.0.26300.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 26H2 for x64-based Systems10.0.26300.9711 · KB5127648Microsoft (MSRC)
Windows Server 20126.2.9200.26434 · KB5126835Microsoft (MSRC)
Windows Server 2012 (Server Core installation)6.2.9200.26434 · KB5126835Microsoft (MSRC)
Windows Server 2012 R26.3.9600.23470 · KB5126836Microsoft (MSRC)
Windows Server 2012 R2 (Server Core installation)6.3.9600.23470 · KB5126836Microsoft (MSRC)
Windows Server 201610.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows Server 2016 (Server Core installation)10.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows Server 201910.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows Server 2019 (Server Core installation)10.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows Server 202210.0.20348.5761 · KB5126655Microsoft (MSRC)
Windows Server 2022 (Server Core installation)10.0.20348.5761 · KB5126655Microsoft (MSRC)

+2

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayOct 21, 2026+8 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-881730 days apartWindows Background Intelligent Transfer Service (BITS) Remote Code Execution Vulnerability
    32Monitor
  • CVE-2026-5067391 days apartWindows Kernel Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-5664891 days apartWindows NFS Server Elevation of Privilege Vulnerability
    30Monitor
  • CVE-2026-20816273 days apartWindows Installer Elevation of Privilege Vulnerability
    29Monitor
  • CVE-2026-840180 days apartWindows Print Spooler Components Elevation of Privilege Vulnerability
    28Monitor
  • CVE-2026-859200 days apartWindows BitLocker Elevation of Privilege Vulnerability
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records