dbcve.org
Windows 10 1809Operating system · Microsoft

CVE-2026-58538

HIGH · 7.8 CVSS v3.1 Published 2026-07-14
Fix available
A fix is available. Upgrade to 10.0.17763.9020 / 10.0.19044.7548 or later.
See remediation →
80/100
Remediation priority · High
Zero-click 5 weeks old

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
Heap-based buffer overflow in Windows Bluetooth Service allows an authorized attacker to elevate privileges locally.

In the news

Third-party coverage
Trending covered by 1 outlet this week · latest 1mo ago

Surfaced from public web coverage — external links open in a new tab.

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

Heap-based buffer overflow vulnerability in the Windows Bluetooth Service enables a locally authorized attacker to execute arbitrary code with elevated privileges. The vulnerability stems from improper bounds checking when handling Bluetooth-related operations, allowing an attacker to overflow the heap buffer and gain SYSTEM-level access.

MitigationApply Microsoft security updates for Windows once available; until then, limit local access to trusted users and monitor for suspicious Bluetooth service activity.

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 1809Operating system
Affected:< 10.0.17763.9020
Windows 10 21h2Operating system
Affected:< 10.0.19044.7548
Windows 10 22h2Operating system
Affected:< 10.0.19045.7548
Windows 11 24h2Operating system
Affected:< 10.0.26100.8875
Windows 11 25h2Operating system
Affected:< 10.0.26200.8875
Windows 11 26h1Operating system
Affected:< 10.0.28000.2269
Windows Server 2019Operating system
Affected:< 10.0.17763.9020
Windows Server 2022Operating system
Affected:< 10.0.20348.5386

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

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 build version
    Run 'winver' or 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' to obtain the full Windows build number
    Affected if The build number is lower than any of these thresholds: 10.0.17763.9020, 10.0.19044.7548, 10.0.19045.7548, 10.0.26100.8875, 10.0.26200.8875, 10.0.28000.2269, or 10.0.20348.5386 depending on your Windows edition and version
  2. Verify Bluetooth service status
    Run 'Get-Service bthserv' in PowerShell or check Services.msc for the 'Bluetooth Support Service'
    Affected if The bthserv service is running (vulnerability exists in this service)
  3. Check for Bluetooth hardware
    Run 'Get-PnpDevice -Class Bluetooth' in PowerShell or check Device Manager for Bluetooth adapters
    Affected if A Bluetooth adapter is present and enabled, providing the attack surface for the vulnerable code path

You are affected if your Windows build version is below the threshold for your specific edition AND the Bluetooth service is running with a Bluetooth adapter present.

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 10.0.17763.9020 / 10.0.19044.7548 / 10.0.19045.7548 or later
Fixed in 10.0.17763.902010.0.19044.754810.0.19045.7548
Interim mitigation

Apply Microsoft security updates for Windows once available; until then, limit local access to trusted users and monitor for suspicious Bluetooth service activity.

Recommended fix High confidence

Apply the relevant Windows security update (KB) for your specific Windows version to reach the fixed build numbers listed above

  1. Check current Windows version by running `winver` or `systeminfo | findstr /B /C:"OS Name" /C:"OS Version"`
  2. Identify the specific Windows 10/11 or Windows Server version and build number from the affected versions list
  3. Apply the appropriate Windows security update that includes the fix for this vulnerability
  4. For Windows 10 1809: Update to build 10.0.17763.9020 or later
  5. For Windows 10 21h2: Update to build 10.0.19044.7548 or later
  6. For Windows 10 22h2: Update to build 10.0.19045.7548 or later
  7. For Windows 11 24h2: Update to build 10.0.26100.8875 or later
  8. For Windows 11 25h2: Update to build 10.0.26200.8875 or later
Caveat Standard Windows update - minimal risk; ensure backups and test in staging if possible

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

Fix this in Windows 10 1809 Scoped from the published advisory
  • Consultation4.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
32.0 hours of engineering $5,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.

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-2026-58538 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