Vulnerability Intelligence Report
M365 Copilot Information Disclosure Vulnerability
CVE-2026-24307
Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:2.9
Impact Score:5.8
EPSS Probability:0.81%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-1287 ↗CWE-1287: Improper Validation of Specified Type of Input
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Microsoft 365 Copilot | - (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.809%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-01-21T21:28:02 |
| Published | 2026-01-22T22:47:36 |
| Patch Date | 2026-01-22 |
| Last Updated | 2026-07-30T20:47:32 |
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