{"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 deserialization of untrusted data flaw (CWE-502) in M365 Copilot. The source says an authorized attacker can exploit it over a network to execute code. NVD has not yet provided an assessment, and the source lists Microsoft Corporation as the CVE source.","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,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":["Microsoft"],"affectedVendorsRaw":["M365 Copilot"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":"M365 Copilot deserialization of untrusted data over a network","headlinePromptVersion":"h1","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":0.01694,"epssCheckedAt":"2026-11-04T12:08:34.077Z","kevDateAdded":null,"advisoryAliases":["GHSA-cfm3-7vpc-px47"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":"2026-11-02T12:08:50.650Z","patchAvailable":null,"disclosureDate":"2026-07-24T01:17:02.257Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":["CAPEC-586"],"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality","integrity","availability"],"aiComponentTargeted":"plugin","llmSpecific":false,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null,"fixes":[]}}