dbcve.org
Windows 10 1507Operating system · Microsoft

CVE-2025-21375

HIGH · 7.8 CVSS v3.1 Published 2025-02-11
Fix available
A fix is available. Upgrade to 10.0.10240.20915 / 10.0.14393.7785 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

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
Kernel Streaming WOW Thunk Service Driver Elevation of Privilege Vulnerability

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
How this class of weakness works · CWE-20

The application accepts input without confirming it is well-formed or within expected bounds, so malformed data can push the program into states its author never anticipated. Attackers probe these gaps to trigger crashes, bypass logic, or feed tainted values into more dangerous operations downstream. Remediating it well means validating and normalising every input at the boundary against a strict allow-list — not merely filtering known-bad values.

General guidance for the improper input validation class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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 1507Operating system
Affected:< 10.0.10240.20915
Windows 10 1607Operating system
Affected:< 10.0.14393.7785
Windows 10 1809Operating system
Affected:< 10.0.17763.6893
Windows 10 21h2Operating system
Affected:< 10.0.19044.5487
Windows 10 22h2Operating system
Affected:< 10.0.19045.5487
Windows 11 22h2Operating system
Affected:< 10.0.22621.4890
Windows 11 23h2Operating system
Affected:< 10.0.22631.4890
Windows 11 24h2Operating system
Affected:< 10.0.26100.3194

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
High
Availability
High

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

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 10.0.10240.20915 / 10.0.14393.7785 / 10.0.17763.6893 or later
Fixed in 10.0.10240.2091510.0.14393.778510.0.17763.6893
Vendor patch msrc.microsoft.com →
Recommended fix High confidence

Windows 10 1507 to build 10.0.10240.20915 or later | Windows 10 1607 to build 10.0.14393.7785 or later | Windows 10 1809 to build 10.0.17763.6893 or later | Windows 10 21h2 to build 10.0.19044.5487 or later | Windows 10 22h2 to build 10.0.19045.5487 or later | Windows 11 22h2 to build 10.0.22621.489

  1. Check current Windows version by running 'winver' or 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"'
  2. Identify the Windows 10 or 11 version and build number from the output
  3. Open the Microsoft Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21375
  4. Locate the specific Security Update (KB article) for your Windows version from the vendor advisory
  5. Apply the update via Windows Update (Settings > Update & Security > Windows Update > Check for updates) or manually download the KB from the Microsoft Catalog
  6. Restart the system when prompted to complete the patch installation
  7. Verify the patch installed successfully by checking the installed updates (control panel > programs > view installed updates)
Caveat Standard Windows security update - no expected breaking changes; test mission-critical applications as per normal deployment practice

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

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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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-2025-21375 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