CVE-2026-34332
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 after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code 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 · moderate confidenceUse-after-free vulnerability in Windows Kernel-Mode Drivers allowing an authorized attacker to execute code over a network. This is a memory corruption bug where kernel memory is accessed after being freed, potentially leading to arbitrary code execution with kernel privileges.
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< 10.0.26100.32772CVSS 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
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 checksWork through these to decide whether this CVE applies to you.
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Check Windows version and build numberRun 'winver' from command prompt or 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' to see the installed Windows version and build numberAffected if The system is running Microsoft Windows Server 2025 with a build number lower than 26100.32772
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Verify exact OS build via registryRun 'reg query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v CurrentBuildNumber' and compare the value to 26100. If the value is less than 26100, or if it equals 26100 but the full version (like 10.0.26100.xxxxx) is below 32772, the system may be affectedAffected if CurrentBuildNumber is 26100 or lower, or the full version string shows a build below 32772
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Identify loaded kernel-mode driversRun 'driverquery /v' or check 'sc query type= driver' to list loaded kernel-mode drivers. The vulnerability exists in Windows Kernel-Mode Drivers, so any third-party or Microsoft kernel drivers could potentially be the attack vectorAffected if The system has kernel-mode drivers loaded and the OS version falls within the affected range
If the system is Windows Server 2025 with build number below 26100.32772 and has kernel-mode drivers loaded, the environment is potentially affected by this use-after-free vulnerability.
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 · scoped10.0.26100.32772
Apply Microsoft security patches for affected Windows versions once available; ensure kernel-mode drivers are updated to patched versions. Restrict network exposure and privileged operations to limit attack surface.
Windows Server 2025 version 10.0.26100.32772 or later
- Apply the latest Windows security updates via Windows Update or your organization's patch management system
- Verify that the installed version is 10.0.26100.32772 or higher
- Restart the server as required by the security update
- Confirm the vulnerability is remediated by checking the installed security update matches the MSRC advisory for CVE-2026-34332
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-34332 — 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-2026-34332 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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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.
- 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