CVE-2026-24307

{"id": "CVE-2026-24307", "cveTags": [{"tags": ["exclusively-hosted-service"], "sourceIdentifier": "secure@microsoft.com"}], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.3, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 2.8}]}, "published": "2026-01-22T23:15:59.003", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24307", "source": "secure@microsoft.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-1287"}]}], "descriptions": [{"lang": "en", "value": "Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network."}], "lastModified": "2026-01-26T15:04:14.850", "sourceIdentifier": "secure@microsoft.com"}