CVE-2026-85887

EUVD-2026-82600
Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 57.87%
Affected Products (NVD)
VendorProductVersion
microsoft365_copilot
-
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85887