dbcve.org
Windows 10 1607Operating system · Microsoft

CVE-2026-27930

MEDIUM · 5.5 CVSS v3.1 Published 2026-04-14
Fix available
A fix is available. Upgrade to 10.0.14393.9060 / 10.0.17763.8644 or later.
See remediation →
58/100
Remediation priority · Elevated
No privileges

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
Out-of-bounds read in Windows GDI allows an unauthorized 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 confidence

Out-of-bounds read vulnerability in Windows GDI (Graphics Device Interface) allows a local unauthorized attacker to read memory beyond intended boundaries, potentially exposing sensitive system information.

MitigationApply Microsoft's security updates for Windows to patch the GDI vulnerability. Ensure systems are patched according to organization's patch management policy.

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 1607Operating system
Affected:< 10.0.14393.9060
Windows 10 1809Operating system
Affected:< 10.0.17763.8644
Windows 10 21h2Operating system
Affected:< 10.0.19044.7184
Windows 10 22h2Operating system
Affected:< 10.0.19045.7184
Windows 11 23h2Operating system
Affected:< 10.0.22631.6936
Windows 11 24h2Operating system
Affected:< 10.0.26100.8246
Windows 11 25h2Operating system
Affected:< 10.0.26200.8246
Windows 11 26h1Operating system
Affected:< 10.0.28000.1836

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
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 checks

Work through these to decide whether this CVE applies to you.

  1. Check Windows 10 version build number
    Run `winver` or execute `systeminfo | findstr /B /C:"OS Name" /C:"OS Version"` to view the installed Windows build
    Affected if For Windows 10 1607: build < 14393.9060; for 1809: build < 17763.8644; for 21h2: build < 19044.7184; for 22h2: build < 19045.7184
  2. Check Windows 11 version build number
    Run `winver` or execute `systeminfo | findstr /B /C:"OS Name" /C:"OS Version"` to view the installed Windows build
    Affected if For Windows 11 23h2: build < 22631.6936; for 24h2: build < 26100.8246; for 25h2: build < 26200.8246; for 26h1: build < 28000.1836
  3. Query Windows version via PowerShell
    Run `powershell -Command "[System.Environment]::OSVersion.Version"` or `Get-ComputerInfo | Select-Object OsName, OsVersion, OsBuildNumber`
    Affected if The OsBuildNumber returned is lower than the fixed build for that Windows release line as listed in step 1 or 2

The system is affected if it runs any of the listed Windows 10 or Windows 11 versions with a build number lower than the corresponding fixed version threshold for that release.

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 10.0.14393.9060 / 10.0.17763.8644 / 10.0.19044.7184 or later
Fixed in 10.0.14393.906010.0.17763.864410.0.19044.7184
Interim mitigation

Apply Microsoft's security updates for Windows to patch the GDI vulnerability. Ensure systems are patched according to organization's patch management policy.

Recommended fix High confidence

Install the appropriate cumulative security update from Microsoft Update Catalog that brings your build to: Windows 10 1607: 10.0.14393.9060+, Windows 10 1809: 10.0.17763.8644+, Windows 10 21h2: 10.0.19044.7184+, Windows 10 22h2: 10.0.19045.7184+, Windows 11 23h2: 10.0.22631.6936+, Windows 11 24h2:

  1. Check current Windows build version by running 'winver' or 'systeminfo | findstr /B /C:"OS Version"'
  2. Open Windows Settings and navigate to Update & Security > Windows Update
  3. Click 'Check for updates' and install all available security updates
  4. Alternatively, manually download the specific KB patch from the Microsoft Update Catalog corresponding to your Windows version
  5. After installation, restart the system to apply the security update
  6. Verify the fix by checking that the installed build number meets or exceeds the fixed version for your Windows release
Caveat Standard Windows security update with no expected breaking changes; routine restart required

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

Fix this in Windows 10 1607 Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,424.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-27930 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2026-27930 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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