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HIGH · 7.1

CVE-2026-26133

AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Vulnerability Description

AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.

CVSS Score

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
Microsoft365 Copilot< 2.107.2
MicrosoftEdge< 145.3800.99
MicrosoftExcel< 2.106.2
MicrosoftLoop< 2.106
MicrosoftOnenote< 16.0.19725.20142
MicrosoftOutlook< 5.2605.0
MicrosoftPower Bi< 2.2.260210.21290750
MicrosoftPowerpoint< 2.106.2
MicrosoftTeams< 1.0.0.2026043102
MicrosoftWord< 2.106.2

Related Weaknesses (CWE)

CWE-77

References

FAQ

What is CVE-2026-26133?

CVE-2026-26133 is a vulnerability with a CVSS score of 7.1 (HIGH). AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.

How severe is CVE-2026-26133?

CVE-2026-26133 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-26133?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft 365 Copilot, Microsoft Edge, Microsoft Excel, Microsoft Loop, Microsoft Onenote.