CVE-2026-85887
High
Description
Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.
SeverityHigh
CVSS7.7
Exploit probability—
Product
Microsoft 365 Copilot
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-732CWE-732
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft 365_copilot | No range specified | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
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