CVE-2026-85885

Microsoft 365 Copilot Elevation of Privilege Vulnerability

Published Sep 17, 2026 CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed
Description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.
Title Microsoft 365 Copilot Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft 365 Copilot
Weaknesses CWE-77
CPEs cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft 365 Copilot
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 9:29 PM
Reserved
Sep 4, 2026, 6:18 PM
Status
Analyzed
Published
Sep 17, 2026, 11:18 PM
Modified
Sep 25, 2026, 8:00 PM