CVE-2026-24307
Unknown Unknown - Not Provided
Improper Input Validation in M365 Copilot Enables Data Disclosure

Publication date: 2026-01-22

Last updated on: 2026-02-12

Assigner: Microsoft Corporation

Description
Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-01-22
Last Modified
2026-02-12
Generated
2026-06-16
AI Q&A
2026-01-23
EPSS Evaluated
2026-06-14
NVD
CVE-2026-24307
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft 365_copilot *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-1287 The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability involves improper validation of a specified type of input in Microsoft 365 Copilot, which allows an unauthorized attacker to disclose information over a network.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information over a network, potentially compromising confidentiality and leading to data breaches.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-24307. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart