CVE-2026-54124
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 · uneditedInteger overflow or wraparound in Windows Terminal 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 confidenceInteger overflow or wraparound vulnerability in Windows Terminal that allows a local unauthorized attacker to execute arbitrary code. This memory corruption issue stems from improper integer handling in the terminal application, potentially leading to controlled code execution.
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< 1.24.11321.0< 10.0.19044.7548< 10.0.19045.7548< 10.0.26100.8875< 10.0.26200.8875< 10.0.28000.2269< 10.0.28000.2525< 10.0.20348.5386< 10.0.26100.33158CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/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 if Windows Terminal is installedOpen PowerShell and run: Get-AppxPackage -Name *Microsoft.WindowsTerminal* | Select-Object Name, PackageFullName, VersionAffected if No Windows Terminal package is returned, meaning the application is not installed and this CVE does not apply
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Determine Windows Terminal versionRun: wt --version from Command Prompt or PowerShell, or check the version in Windows Settings > Apps > Installed Apps > Windows Terminal > Version infoAffected if The installed version is less than 1.24.11321.0
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Check Windows 10 version numberRun: winver or run: systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Affected if Running Windows 10 21h2 (build < 10.0.19044.7548) or Windows 10 22h2 (build < 10.0.19045.7548)
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Check Windows 11 version numberRun: winver or run: systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Affected if Running Windows 11 24h2 (build < 10.0.26100.8875), 25h2 (build < 10.0.26200.8875), or 26h1 (build < 10.0.28000.2269 or < 10.0.28000.2525)
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Check Windows Server versionRun: winver or run: systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Affected if Running Windows Server 2022 (build < 10.0.20348.5386) or Windows Server 2025 (build < 10.0.26100.33158)
You are affected if Windows Terminal version is below 1.24.11321.0 OR your Windows OS build number falls below the affected thresholds for your specific Windows version (10.x for Windows 10/11/Server).
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 data1.24.11321.010.0.19044.754810.0.19045.7548
Apply available Microsoft security updates for Windows Terminal. Until a patch is released, restrict local access to trusted users and monitor for suspicious terminal behavior.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,648.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-54124 — 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-2026-54124 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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