CVE-2026-54992
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 · uneditedHeap-based buffer overflow in Windows Message Queuing Queue Manager allows an unauthorized attacker to execute code 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 heap-based buffer overflow vulnerability exists in the Windows Message Queuing (MSMQ) Queue Manager component. The vulnerability allows a local, unauthorized attacker to execute arbitrary code by overflowing a heap buffer in the MSMQ service.
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< 10.0.28000.2525all 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
- 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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Verify MSMQ is installedOpen PowerShell and run: Get-WindowsOptionalFeature -Online -FeatureName MSMQ* | Select-Object FeatureName, StateAffected if MSMQ is installed (State equals 'Enabled')
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Confirm MSMQ service is runningOpen PowerShell and run: Get-Service -Name MSMQ | Select-Object Name, StatusAffected if MSMQ service Status equals 'Running'
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Check Windows versionOpen PowerShell and run: winver or [System.Environment]::OSVersion.VersionAffected if Version falls within affected ranges: 10.0.14393.9339 or lower for 1607; 10.0.17763.9020 or lower for 1809; 10.0.19044.7548 or lower for 21h2; 10.0.19045.7548 or lower for 22h2; 10.0.26100.8875 or lower for 11 24h2; 10.0.26200.8875 or lower for 11 25h2; 10.0.28000.2525 or lower for 11 26h1; any vers
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Check Queue Manager component versionOpen PowerShell and run: Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\MSMQ\Parameters' -ErrorAction SilentlyContinue | Select-Object Build, VersionAffected if MSMQ Queue Manager component version is lower than the Windows version threshold indicating an unpatched state
The environment is affected if MSMQ is installed and running on a Windows version within the affected version ranges listed.
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 data10.0.14393.933910.0.17763.902010.0.19044.7548
Apply the relevant Microsoft security patch for this vulnerability. Until patched, restrict access to MSMQ services and monitor for suspicious local activity.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-54992 — 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-2026-54992 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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