CVE-2026-50517
Microsoft M365 Copilot Remote Code Execution Vulnerability
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
| Vendor | microsoft |
| Product | microsoft 365 copilot |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jul 24, 2026 |
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CVSS v3 Breakdown
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 Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft 365 Copilot
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