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CVE-2026-85887

M365 Copilot Information Disclosure Vulnerability

HIGH
7.7
CVSS Score
Published: September 17, 2026 at 11:04 PM UTC
Updated: October 14, 2026 at 11:15 PM UTC
1 product affected across 1 vendor365 Copilot

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Severity
HIGH7.7
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85887

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-732

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