CVE-2026-41090

Microsoft Copilot Tampering Vulnerability

Published May 22, 2026 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering 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
First Time appeared Microsoft 365 Copilot
CPEs cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:iphone_os:*:*
Vendors & Products Microsoft 365 Copilot
Type Values Removed Values Added
Metrics ssvc

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

ssvc

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

Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Microsoft 365 Copilot Ios
Vendors & Products Microsoft 365 Copilot Ios
Type Values Removed Values Added
Description Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
Title Microsoft Copilot Tampering Vulnerability
First Time appeared Microsoft
Microsoft 365 Copilot Ios
Weaknesses CWE-77
CPEs cpe:2.3:a:microsoft:365_copilot_iOS:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft 365 Copilot Ios
References
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Aug 10, 2026, 3:12 PM
Reserved
Apr 16, 2026, 7:12 PM
Status
Analyzed
Published
May 22, 2026, 11:16 PM
Modified
Jul 23, 2026, 11:10 AM