dbcve.org
Windows 10 1507Operating system · Microsoft

CVE-2025-21389

HIGH · 7.5 CVSS v3.1 Published 2025-01-14
Fix available
A fix is available. Upgrade to 10.0.10240.20890 / 10.0.14393.7699 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges 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
Uncontrolled resource consumption in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker to deny service over a network.

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-400

A single request can consume unbounded CPU, memory, or connections, so a modest amount of malicious traffic exhausts the service. The result is denial of service for everyone else. Remediation is enforcing limits, quotas, and timeouts on what any one request can use.

General guidance for the uncontrolled resource consumption 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:< 10.0.10240.20890
Windows 10 1607Operating system
Affected:< 10.0.14393.7699
Windows 10 1809Operating system
Affected:< 10.0.17763.6775
Windows 10 21h2Operating system
Affected:< 10.0.19044.5371
Windows 10 22h2Operating system
Affected:< 10.0.19045.5371
Windows 11 22h2Operating system
Affected:< 10.0.22621.4751
Windows 11 23h2Operating system
Affected:< 10.0.22631.4751
Windows 11 24h2Operating system
Affected:< 10.0.26100.2894

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
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 10.0.10240.20890 / 10.0.14393.7699 / 10.0.17763.6775 or later
Fixed in 10.0.10240.2089010.0.14393.769910.0.17763.6775
Vendor patch msrc.microsoft.com →
Recommended fix High confidence

Windows 10 1507: 10.0.10240.20890 | Windows 10 1607: 10.0.14393.7699 | Windows 10 1809: 10.0.17763.6775 | Windows 10 21h2: 10.0.19044.5371 | Windows 10 22h2: 10.0.19045.5371 | Windows 11 22h2: 10.0.22621.4751 | Windows 11 23h2: 10.0.22631.4751 | Windows 11 24h2: 10.0.26100.2894

  1. Verify current Windows version and build number by running 'winver' or 'systeminfo'
  2. Open Windows Update by navigating to Settings > Update & Security > Windows Update
  3. Click 'Check for updates' to download and install the latest security updates
  4. Ensure the security update for CVE-2025-21389 is installed (check update history for the specific KB)
  5. Restart the computer when prompted to complete the installation
  6. Alternatively, manually download the security update from the Microsoft Catalog using the KB number listed in the MSRC guide

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

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-2025-21389 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