{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-50517", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-06-04T19:00:41.292Z", "datePublished": "2026-07-24T00:01:11.819Z", "dateUpdated": "2026-07-24T00:01:11.819Z"}, "containers": {"cna": {"title": "Microsoft M365 Copilot Remote Code Execution Vulnerability", "datePublic": "2026-07-23T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*", "versionStartIncluding": "-"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft 365 Copilot", "versions": [{"version": "-", "status": "affected"}]}], "descriptions": [{"value": "Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-502: Deserialization of Untrusted Data", "lang": "en-US", "type": "CWE", "cweId": "CWE-502"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-07-24T00:01:11.819Z"}, "references": [{"name": "Microsoft M365 Copilot Remote Code Execution Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50517"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "CRITICAL", "baseScore": 9.9, "vectorString": "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"}}], "tags": ["exclusively-hosted-service"]}}}

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