CVE-2026-50677
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 Media allows an authorized attacker to elevate privileges locally.
In the news
Third-party coverage- Microsoft July 2026 Patch Tuesday fixes massive 570 flaws, 3 zero-days
- Microsoft CVE Summary - Bleeping Computer
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 confidenceA use-after-free vulnerability exists in Windows Media that allows a locally authorized attacker to elevate privileges. The vulnerability stems from improper memory management where the program continues to use memory after it has been freed, potentially allowing an attacker to execute arbitrary code with elevated 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< 10.0.26100.8875< 10.0.26200.8875< 10.0.28000.2525CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Check Windows 11 version build numberRun 'winver' from command prompt or check System Properties, or run 'systeminfo' and look at the 'OS Version' field. Also via PowerShell: Get-ComputerInfo | Select-Object WindowsProductName, WindowsVersion, OsBuildNumberAffected if The OS build number is less than 26100.8875 for 24h2, less than 26200.8875 for 25h2, or less than 28000.2525 for 26h1. If unsure which branch, any build below these thresholds in the 24h2/25h2/26h1 line is potentially affected.
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Confirm Windows Media component availabilityVerify Windows Media Player or Media Foundation components are present on the system. Check for the presence of 'wmplayer.exe' in C:\Windows\System32\ or verify the Media Foundation DLLs (mf.dll, mfplat.dll) exist in the system. In PowerShell: Test-Path 'C:\Windows\System32\wmplayer.exe'Affected if Windows Media components are installed and accessible on the system (this is the default state for most Windows 11 installations).
The system is affected if it runs Windows 11 24h2/25h2/26h1 with a build number below the patched thresholds AND has Windows Media components present, which is the default configuration.
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.
From vendor data10.0.26100.887510.0.26200.887510.0.28000.2525
Apply the relevant Microsoft security update for Windows Media when released. As a compensating control, restrict user permissions and monitor for suspicious processes attempting to exploit local privilege escalation vectors.
- Consultation2.0 h
- Implementation1.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-50677 — 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-2026-50677 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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- 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
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