365 Copilot
CVE-2026-24307
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
AnalysisAI
M365 Copilot has an input validation vulnerability allowing unauthorized attackers to extract sensitive information through crafted prompts over the network.
Technical ContextAI
Microsoft 365 Copilot has a CWE-1287 improper validation of specified type of input that allows attackers to craft inputs that bypass safety controls and extract sensitive information from the AI assistant's context.
RemediationAI
Microsoft has released updates. Review Copilot access permissions and data classification policies.
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Same technique Information Disclosure
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External POC / Exploit Code
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