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CopilotApplication · Microsoft

CVE-2026-26136

HIGH · 7.5 CVSS v3.1 Published 2026-03-19
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.

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 confidence

Command injection vulnerability in Microsoft Copilot where special elements in commands are not properly neutralized, allowing an unauthorized attacker to execute commands that can disclose sensitive information over a network.

MitigationApply Microsoft security updates for Copilot when available; monitor Microsoft's security advisory channels for patch release and deployment guidance.

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
CopilotApplication
Affected:all versions

CVSS 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
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Determine if Microsoft Copilot is installed
    Check installed applications or features list for Microsoft Copilot, or verify Copilot is available in the system (e.g., via Start menu search, Windows Features, or enterprise software inventory)
    Affected if Microsoft Copilot is present and accessible on the system
  2. Confirm Copilot functionality is enabled
    Attempt to access or invoke Copilot through its interface (e.g., Windows key + C, dedicated app, or integrated assistant) to verify it is functional and not disabled by policy
    Affected if Copilot responds to queries and accepts user input, indicating the command processing feature is active
  3. Identify if network access is permitted
    Review network configuration, firewall rules, or proxy settings that control outbound connections from the Copilot client
    Affected if The system running Copilot can make outbound network connections, allowing the disclosed sensitive information to be exfiltrated

If Microsoft Copilot is installed, functional, and can communicate over a network, the environment is affected by this command injection vulnerability since all versions are impacted.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply Microsoft security updates for Copilot when available; monitor Microsoft's security advisory channels for patch release and deployment guidance.

Fix this in Copilot Scoped from the published advisory
  • Consultation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
8.0 hours of engineering $1,460
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,336.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-26136 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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