CVE-2026-48561
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 · uneditedImproper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to execute code over a network.
In the news
Third-party coverage- Patchpocalypse Now: Microsoft tops last month's record with 622 Patch ...
- Microsoft July 2026 Patch Tuesday fixes massive 570 flaws, 3 zero-days
- Records Are Made to Be Broken: Patch Tuesday Raises Triage Stakes
- 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 · low confidenceA command injection vulnerability in Microsoft Edge's Copilot Chat feature allows unauthenticated attackers to execute arbitrary code remotely. The vulnerability stems from improper neutralization of special elements in commands, enabling an attacker to inject malicious commands through the chat interface.
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 dataall versionsCVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 Microsoft Edge installationCheck if Microsoft Edge is installed by looking for the executable at %ProgramFiles(x86)%\Microsoft\Edge\Application\msedge.exe or %LocalAppData%\Microsoft\Edge\Application\msedge.exeAffected if Microsoft Edge is present and has Copilot Chat functionality
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Confirm Microsoft 365 Copilot subscriptionVerify if the system has an active Microsoft 365 subscription that includes Copilot by checking account licensing through the Microsoft 365 admin portal or running 'Get-MsolAccountSku' in PowerShell for tenant-level licensing infoAffected if A Microsoft 365 Copilot license is assigned to the user or tenant
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Check Copilot Chat feature statusIn Microsoft Edge, navigate to edge://settings/cookies or check Group Policy/Intune settings for Copilot enablement status; also verify if the Copilot icon appears in the Edge sidebarAffected if Copilot Chat feature is enabled and accessible in Edge
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Review browser security logsExamine Windows Event Viewer under Application and Services Logs > Microsoft > Windows > Edge for suspicious entries, and check Edge's browsing history for unexpected Copilot interactionsAffected if Logs show unexpected or unauthorized Copilot Chat sessions or command-like input patterns
A system is affected if Microsoft Edge with Copilot Chat is installed, Microsoft 365 Copilot is licensed, and the Copilot Chat feature is enabled, allowing unsanitized input to potentially reach system commands.
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 dataOrganizations should restrict or disable Copilot Chat in Edge via group policy until Microsoft releases an official patch. Implement network-level monitoring for suspicious Edge traffic and educate users about the risk.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48561 — 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-2026-48561 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
- No spam, self-promotion, credentials, or personal data