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CVE-2026-24307
CRITICAL9.3
Description
Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVE Details
CVSS v3.1 Score9.3
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
Published1/22/2026
Last Modified2/12/2026
Sourcenvd
Honeypot Sightings0
Affected Products
microsoft:365_copilot
Weaknesses (CWE)
CWE-1287
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24307(secure@microsoft.com)
IOC Correlations
No correlations recorded
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