CVE-2026-85887

Published Sep 18, 2026

Last updated a month ago

Overview

Description
Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.
Source
secure@microsoft.com
NVD status
Analyzed
CNA Tags
exclusively-hosted-service
Products
365_copilot

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.7
Impact score
4
Exploitability score
3.1
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-732

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.