dbcve.org
Windows 10 1607Operating system · Microsoft

CVE-2026-42971

MEDIUM · 5.5 CVSS v3.1 Published 2026-06-09
Fix available
A fix is available. Upgrade to 10.0.14393.9234 / 10.0.17763.8880 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a local information disclosure vulnerability in the Windows Push Notifications component. An authorized attacker with local access to the system can exploit this to disclose sensitive information. The vulnerability stems from improper access controls within the Windows Push Notifications system that allow a low-privileged user to access data they should not have permission to view.

MitigationApply the relevant Microsoft security update for Windows Push Notifications. Ensure systems are patched with the latest cumulative updates and verify that users operate with the principle of least privilege to limit potential exposure.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Windows 10 1607Operating system
Affected:< 10.0.14393.9234
Windows 10 1809Operating system
Affected:< 10.0.17763.8880
Windows 10 21h2Operating system
Affected:< 10.0.19044.7417
Windows 10 22h2Operating system
Affected:< 10.0.19045.7417
Windows 11 23h2Operating system
Affected:< 10.0.22631.7219
Windows 11 24h2Operating system
Affected:< 10.0.26100.8655
Windows 11 25h2Operating system
Affected:< 10.0.26200.8655
Windows 11 26h1Operating system
Affected:< 10.0.28000.2269

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check Windows version and build number
    Open Command Prompt or PowerShell and run: winver or systeminfo | findstr /B /C:"OS Name" /C:"OS Version" or [System.Environment]::OSVersion.Version
    Affected if The displayed version matches any of the affected builds: Windows 10 1607 (<10.0.14393.9234), 1809 (<10.0.17763.8880), 21h2 (<10.0.19044.7417), 22h2 (<10.0.19045.7417), or Windows 11 23h2 (<10.0.22631.7219), 24h2 (<10.0.26100.8655), 25h2 (<10.0.26200.8655), 26h1 (<10.0.28000.2269)
  2. Verify Windows Push Notifications service status
    Open Services console (services.msc) and locate 'Windows Push Notifications User Service_XXXXX' or run: Get-Service | Where-Object {$_.Name -like '*Push*'}
    Affected if The Windows Push Notifications service is running or enabled on the system
  3. Confirm notification settings configuration
    Go to Settings > System > Notifications, or run: Get-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings' -ErrorAction SilentlyContinue
    Affected if Windows Push Notifications are enabled (the vulnerability applies when notifications are configured)

A system is affected if it runs any Windows 10 or 11 version within the listed affected build ranges AND has Windows Push Notifications feature available or enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 10.0.14393.9234 / 10.0.17763.8880 / 10.0.19044.7417 or later
Fixed in 10.0.14393.923410.0.17763.888010.0.19044.7417
Interim mitigation

Apply the relevant Microsoft security update for Windows Push Notifications. Ensure systems are patched with the latest cumulative updates and verify that users operate with the principle of least privilege to limit potential exposure.

Recommended fix High confidence

Windows 10 1607: >= 10.0.14393.9234 | Windows 10 1809: >= 10.0.17763.8880 | Windows 10 21h2: >= 10.0.19044.7417 | Windows 10 22h2: >= 10.0.19045.7417 | Windows 11 23h2: >= 10.0.22631.7219 | Windows 11 24h2: >= 10.0.26100.8655 | Windows 11 25h2: >= 10.0.26200.8655 | Windows 11 26h1: >= 10.0.28000.226

  1. Open Settings > Update & Security > Windows Update on the affected Windows machine
  2. Click 'Check for updates' to download and install the latest cumulative security update
  3. Restart the system when prompted to complete the installation
  4. Verify the installed version matches or exceeds the fixed version for your Windows release (e.g., Windows 10 22h2 should be >= 10.0.19045.7417)
Caveat Standard Windows cumulative update; minimal risk of compatibility issues

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Windows 10 1607 Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-42971 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data