CVE-2026-42969
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 · uneditedUse of uninitialized resource 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 confidenceThis is an information disclosure vulnerability in Windows Push Notifications where an uninitialized resource (likely memory) is used, potentially exposing sensitive data from previous operations. An authorized attacker with local access could exploit this to read information from uninitialized memory regions.
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< 10.0.14393.9234< 10.0.17763.8880< 10.0.19044.7417< 10.0.19045.7417< 10.0.22631.7219< 10.0.26100.8655< 10.0.26200.8655< 10.0.28000.2269CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Check Windows build versionOpen Command Prompt or PowerShell and run 'winver' or 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' to obtain the full build number (e.g., 10.0.19045.7417)Affected if The installed build number falls below any of the following thresholds: 14393.9234 (Win10 1607), 17763.8880 (Win10 1809), 19044.7417 (Win10 21h2), 19045.7417 (Win10 22h2), 22631.7219 (Win11 23h2), 26100.8655 (Win11 24h2), 26200.8655 (Win11 25h2), or 28000.2269 (Win11 26h1)
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Verify Push Notifications component presenceCheck if the Windows Push Notification Service (WNS) is available on the system by reviewing installed Windows features via 'Get-WindowsOptionalFeature -Online' or checking the presence of 'Windows.UI.Notifications' namespace in the systemAffected if The Windows Push Notification Service component is present and operational on the affected Windows version
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Confirm local user context exposureReview system logs and accessible memory regions for any evidence of uninitialized memory exposure in notification-related processes. Use tools like Sysinternals ProcDump to capture notification service memory for analysis if authorizedAffected if Evidence exists of uninitialized memory contents appearing in notification service processes or output files
A system is affected if it runs an unpatched Windows 10 or 11 version with a build number below the thresholds listed and has Windows Push Notifications functionality enabled.
Generated from the published advisory. Verify against your own configuration.
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 · scoped10.0.14393.923410.0.17763.888010.0.19044.7417
Apply the Microsoft security update for Windows Push Notifications when released. Until then, limit local access to trusted users and monitor for unusual notification-related activity.
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: 10.0.28000.2269
- Identify the current Windows version by running 'winver' or 'systeminfo' in Command Prompt
- Determine which Windows 10 or 11 version and build is currently installed
- Apply the appropriate Windows Update KB patch for your specific version, or download and install the cumulative update that includes the fix
- Alternatively, enable automatic Windows Updates to receive the security patch automatically
- Restart the system after applying the update to ensure the vulnerability is remediated
- Verify the update was successful by checking the installed updates list or running 'winver' to confirm the build number matches or exceeds the fixed version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-42969 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-42969 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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