CVE-2026-45463

{"id": "CVE-2026-45463", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.4, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.5}]}, "published": "2026-06-09T17:17:20.707", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45463", "source": "secure@microsoft.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-121"}, {"lang": "en", "value": "CWE-191"}]}], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally."}], "lastModified": "2026-06-09T19:32:51.440", "sourceIdentifier": "secure@microsoft.com"}