{"uuid": "fe706956-d9ad-4d84-a33b-31234aa3cb2d", "vulnerability": {"vulnId": "CVE-2026-21509", "altId": []}, "gcve": {"origin_uuid": "caeb2787-0d58-4236-9039-7c86c3e566f3", "object_uuid": "fe706956-d9ad-4d84-a33b-31234aa3cb2d"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2026-06-01T12:49:49+02:00"}, "timestamps": {"asserted_at": "2026-06-01T10:49:49+00:00", "recorded_at": "2026-10-02T07:08:31+00:00", "first_seen_at": "2026-06-01T10:49:49+00:00"}, "scope": {"notes": "Microsoft Office Security Feature Bypass Vulnerability | Affected: Microsoft / Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019, Microsoft Office LTSC 2021, Microsoft Office LTSC 2024 | CVSS: 7.8 (HIGH) | EPSS: 0.70795 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False"}, "evidence": [{"type": "public_report", "source": "previdian", "signal": "successful_exploitation", "confidence": 0.7, "details": {"feed": "Previdian (previdian.com)", "title": "Microsoft Office Security Feature Bypass Vulnerability", "cve_id": "CVE-2026-21509", "vendor": "Microsoft", "ghsa_id": null, "product": "Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019, Microsoft Office LTSC 2021, Microsoft Office LTSC 2024", "added_date": "2026-06-01T10:49:49.668Z", "cvss_score": 7.8, "epss_score": 0.70795, "previous_ids": [], "cvss_severity": "HIGH", "virtual_patch": false, "cvss_estimated": false, "epss_percentile": 0.99384, "used_in_malware": "unknown", "vulnerability_id": "CVE-2026-21509", "ahead_of_cisa_kev": {"unit": "day", "count": 1}, "not_yet_in_cisa_kev": false}}], "references": [{"id": "CVE-2026-21509", "url": "https://www.cve.org/CVERecord?id=CVE-2026-21509"}, {"id": "previdian", "url": "https://previdian.com/CVE-2026-21509"}]}