CVE-2026-57083
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 of uninitialized resource in Microsoft Windows Codecs Library allows an unauthorized attacker to disclose information 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 confidenceUse of uninitialized resource in Microsoft Windows Codecs Library enables a local attacker to disclose information. This is an information disclosure vulnerability (CWE-457) where memory is read before proper initialization, potentially exposing sensitive data to an unauthorized local user.
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< 10.0.14393.9339< 10.0.17763.9020< 10.0.19044.7548< 10.0.19045.7548< 10.0.26100.8875< 10.0.26200.8875< 10.0.28000.2269all versions= r2CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Check Windows versionRun 'winver' or 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' to identify your Windows version and build numberAffected if The Windows build number is lower than any of these thresholds: 14393.9339 (1607), 17763.9020 (1809), 19044.7548 (21h2), 19045.7548 (22h2), 26100.8875 (24h2), 26200.8875 (25h2), 28000.2269 (26h1), OR if running Windows Server 2012 / 2012 R2 (all versions) regardless of build
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Locate Windows Codecs Library fileRun 'dir /s /b %WINDIR%\System32\windowscodecs.dll' to find the Windows Codecs Library DLL file pathAffected if The file exists on the system - the vulnerability exists within this DLL component
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Check Windows Codecs Library versionRight-click the windowscodecs.dll file, select Properties, then view the Details tab to see the File Version, or run 'powershell (Get-Item "C:\Windows\System32\windowscodecs.dll").VersionInfo'Affected if The file version is lower than the version corresponding to the fixed builds above for your Windows release, indicating an unpatched state
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Verify Windows Update patch statusRun 'powershell Get-HotFix | Where-Object {$_.Description -eq "Security Update"} | Sort-Object InstalledOn -Descending | Select-Object -First 10' to list recently installed security updatesAffected if No recent security updates related to Windows Codecs or memory initialization are present, suggesting the vulnerability remains unpatched
You are affected if your Windows version matches one of the affected builds listed AND the Windows Codecs Library (windowscodecs.dll) is present on your system without the corresponding security patch applied.
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 · scoped10.0.14393.933910.0.17763.902010.0.19044.7548
Apply Microsoft security updates for Windows Codecs Library when available; ensure Windows Update is enabled and systems are patched. For defense-in-depth, restrict local access to trusted users only.
Upgrade to the specified build number for your Windows version, or migrate from Windows Server 2012/2012 R2 to a supported Windows Server version (2016 or newer)
- Identify the current Windows version by running 'winver' or 'systeminfo' in Command Prompt
- For Windows 10 1607, upgrade to build 10.0.14393.9339 or later
- For Windows 10 1809, upgrade to build 10.0.17763.9020 or later
- For Windows 10 21h2, upgrade to build 10.0.19044.7548 or later
- For Windows 10 22h2, upgrade to build 10.0.19045.7548 or later
- For Windows 11 24h2, upgrade to build 10.0.26100.8875 or later
- For Windows 11 25h2, upgrade to build 10.0.26200.8875 or later
- For Windows 11 26h1, upgrade to build 10.0.28000.2269 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57083 — 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-2026-57083 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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