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{"affected": [{"affectedData": [{"product": "Microsoft 365 Copilot's Business Chat", "vendor": "Microsoft", "versions": [{"status": "affected", "version": "-"}]}], "source": "secure@microsoft.com"}], "cveTags": [{"sourceIdentifier": "secure@microsoft.com", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network."}], "id": "CVE-2026-78501", "lastModified": "2026-09-18T13:46:33.503", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "secure@microsoft.com", "type": "Primary"}]}, "published": "2026-09-17T23:18:45.770", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78501"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}, {"lang": "en", "value": "CWE-923"}], "source": "secure@microsoft.com", "type": "Primary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft 365 Copilot's Business Chat", "source": "cna", "vendor": "Microsoft"}, "product": "365_copilot_business_chat", "vendor": "microsoft"}], "created": "2026-09-18T11:15:06.934076+00:00", "updated": "2026-09-18T11:15:06.934097+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$365_copilot_business_chat"]}