{"data":{"id":"91769d36-d845-42d1-95a5-4c7d6c204178","title":"CVE-2026-50517: Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.","summary":"CVE-2026-50517 is a vulnerability in Microsoft 365 Copilot where deserialization (the process of converting stored data back into usable objects) of untrusted data allows an authorized attacker to execute code over a network. This means someone with legitimate access to the system could run malicious commands remotely by sending specially crafted data to the application.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50517","publishedAt":"2026-07-24T01:17:02.257Z","cveId":"CVE-2026-50517","cweIds":["CWE-502"],"cvssScore":"9.9","cvssSeverity":"critical","severity":"critical","attackType":["other"],"issueType":"vulnerability","affectedPackages":null,"affectedVendors":["Microsoft"],"affectedVendorsRaw":["Microsoft","M365 Copilot"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","attackVector":"network","attackComplexity":"low","privilegesRequired":"low","userInteraction":"none","exploitMaturity":"unknown","epssScore":0,"patchAvailable":null,"disclosureDate":"2026-07-24T01:17:02.257Z","capecIds":["CAPEC-586"],"crossRefCount":0,"attackSophistication":"moderate","impactType":["integrity","confidentiality","availability"],"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}