Skip to content
Noroxi
CVE-2026-50463· NVD / CVE Program· CNA microsoft

Windows Kernel Information Disclosure Vulnerability

Out-of-bounds read in Windows Kernel allows an unauthorized attacker to disclose information over a network.

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help
Published
Jul 14, 2026
Updated
Sep 25, 2026
EPSS
1.0% · 62th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/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.

Affected systems

VendorProduct
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 24h2
microsoftwindows 11 25h2
microsoftwindows 11 26h1
microsoftwindows server 2019
microsoftwindows server 2022
microsoftwindows server 2025

Affected versions

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

  • microsoft windows server 2019before 10.0.17763.9020
  • microsoft windows server 2022before 10.0.20348.5386
  • microsoft windows server 2025before 10.0.26100.33158

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 1809

    • 10.0.17763.0 and later · before 10.0.17763.9020affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19044.0 and later · before 10.0.19044.7548affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.7548affected

  • Microsoft Windows 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.8875affected

  • Microsoft Windows 11 Version 25H2

    • 10.0.26200.0 and later · before 10.0.26200.8875affected

  • Microsoft Windows 11 version 26H1

    • 10.0.28000.0 and later · before 10.0.28000.2525affected

  • Microsoft Windows Server 2019

    • 10.0.17763.0 and later · before 10.0.17763.9020affected

  • Microsoft Windows Server 2019 (Server Core installation)

    • 10.0.17763.0 and later · before 10.0.17763.9020affected

  • Microsoft Windows Server 2022

    • 10.0.20348.0 and later · before 10.0.20348.5386affected

  • Microsoft Windows Server 2025

    • 10.0.26100.0 and later · before 10.0.26100.33158affected

  • Microsoft Windows Server 2025 (Server Core installation)

    • 10.0.26100.0 and later · before 10.0.26100.33158affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-21412Internet Shortcut Files Security Feature Bypass VulnerabilityKEV
    92Now
  • CVE-2021-36934Windows Elevation of Privilege VulnerabilityKEV
    81Now
  • CVE-2024-21338Windows Kernel Elevation of Privilege VulnerabilityKEV
    79This week
  • CVE-2022-21882Win32k Elevation of Privilege VulnerabilityKEV
    79This week
  • CVE-2024-29988SmartScreen Prompt Security Feature Bypass VulnerabilityKEV
    78This week
  • CVE-2022-21971Windows Runtime Remote Code Execution VulnerabilityKEV
    77This week

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 1809 for 32-bit Systems10.0.17763.9020 · KB5099538Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems10.0.17763.9020 · KB5099538Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems10.0.19044.7548 · KB5099539Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems10.0.19044.7548 · KB5099539Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems10.0.19044.7548 · KB5099539Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems10.0.19045.7548 · KB5099539Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems10.0.19045.7548 · KB5099539Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems10.0.19045.7548 · KB5099539Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 25H2 for ARM64-based Systems10.0.26200.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 25H2 for x64-based Systems10.0.26200.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 26H1 for ARM64-based Systems10.0.28000.2525 · KB5101649Microsoft (MSRC)
Windows 11 version 26H1 for x64-based Systems10.0.28000.2525 · KB5101649Microsoft (MSRC)
Windows Server 201910.0.17763.9020 · KB5099538Microsoft (MSRC)
Windows Server 2019 (Server Core installation)10.0.17763.9020 · KB5099538Microsoft (MSRC)
Windows Server 202210.0.20348.5386 · KB5099540Microsoft (MSRC)
Windows Server 202510.0.26100.33158 · KB5099536Microsoft (MSRC)
Windows Server 2025 (Server Core installation)10.0.26100.33158 · KB5099536Microsoft (MSRC)

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.

No dated events beyond publication.

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-2025-55681273 days apartDesktop Window Manager Elevation of Privilege Vulnerability
    33Monitor
  • CVE-2026-4283735 days apartWindows Projected File System Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-2615391 days apartWindows Encrypted File System (EFS) Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2025-55233217 days apartWindows Projected File System Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2025-62457217 days apartWindows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-6944356 days apartWindows Device Health Attestation (DHA) Information Disclosure Vulnerability
    30Monitor

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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✗ → ✓

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