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Vulnerabilities of Microsoft Microsoft 365 Copilot's Business Chat

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CVE Summary Score Published
CVE-2026-78501 Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's… 8.6 High Sep 17, 2026
CVE-2026-26129 Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an… 7.5 High May 7, 2026
CVE-2026-26164 Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an… 7.5 High May 7, 2026
CVE-2025-59286 Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized… 9.3 Critical Oct 9, 2025
CVE-2025-59272 Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized… 9.3 Critical Oct 9, 2025
CVE-2025-53787 Microsoft 365 Copilot BizChat Information Disclosure Vulnerability 8.2 High Aug 7, 2025
CVE-2025-53774 Microsoft 365 Copilot BizChat Information Disclosure Vulnerability 6.5 Medium Aug 7, 2025

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