CVE-2026-85887
M365 Copilot Information Disclosure Vulnerability
- State
- Published
- Severity
- 7.7 High
- Published
- Sep 17, 2026
- Updated
- Oct 31, 2026
- Reserved
- Sep 4, 2026
Description
Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C | microsoft |
Weaknesses
- CWE-732 Incorrect Permission Assignment for Critical Resource
Affected Products
| Product | Versions |
|---|---|
Microsoft 365 CopilotMicrosoft |
|
References
- M365 Copilot Information Disclosure Vulnerabilityvendor-advisorypatch
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