{"uuid": "02c11f18-8d3a-49d8-8e70-c555c401e45b", "vulnerability": {"vulnId": "CVE-2026-45659", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "02c11f18-8d3a-49d8-8e70-c555c401e45b"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2026-07-01T00:00:00+00:00"}, "timestamps": {"asserted_at": "2026-07-01T00:00:00+00:00", "recorded_at": "2026-07-01T20:00:01+00:00", "first_seen_at": "2026-07-01T00:00:00+00:00"}, "scope": {"notes": "KEV entry: Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability | Affected: Microsoft / SharePoint Server | Description: Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network. | Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. | Due date: 2026-07-04 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-45659"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-502"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "SharePoint Server", "due_date": "2026-07-04", "date_added": "2026-07-01", "vendorProject": "Microsoft", "vulnerabilityName": "Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability", "knownRansomwareCampaignUse": "Unknown"}}], "references": [{"id": "CVE-2026-45659", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-45659"}]}