{"cve":{"cve_id":"CVE-2024-21413","is_kev":true,"kev_date_added":"2025-02-06","kev_vendor_project":"Microsoft","kev_product":"Office Outlook","kev_vulnerability_name":"Microsoft Outlook Improper Input Validation Vulnerability","kev_short_description":"Microsoft Outlook contains an improper input validation vulnerability that allows for remote code execution. Successful exploitation of this vulnerability would allow an attacker to bypass the Office Protected View and open in editing mode rather than protected mode.","kev_required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","kev_due_date":"2025-02-27","kev_known_ransomware":false,"kev_notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413 ; https://nvd.nist.gov/vuln/detail/CVE-2024-21413","kev_cwes":["CWE-20"],"epss_score":0.9466,"epss_percentile":0.99844,"epss_as_of":"2026-06-23","description":"Microsoft Outlook Remote Code Execution Vulnerability","published_at":"2024-02-13T18:02:24.799000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-20"],"nvd_references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T01:52:20.328657Z"},"effective_severity":"CRITICAL","badges":["kev","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"},{"metric":"E","name":"E","value":"U","value_label":"Unchanged"},{"metric":"RL","name":"RL","value":"O","value_label":"O"},{"metric":"RC","name":"RC","value":"C","value_label":"Changed"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-365-apps-for-enterprise","product_name":"Microsoft 365 Apps for Enterprise","version_start":"16.0.1","version_start_inclusive":true,"version_end":"https://aka.ms/OfficeSecurityReleases","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:microsoft-365-apps-for-enterprise:16.0.1:https://aka.ms/OfficeSecurityReleases"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-office-2016","product_name":"Microsoft Office 2016","version_start":"16.0.0","version_start_inclusive":true,"version_end":"16.0.5435.1001","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:microsoft-office-2016:16.0.0:16.0.5435.1001"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-office-2019","product_name":"Microsoft Office 2019","version_start":"19.0.0","version_start_inclusive":true,"version_end":"https://aka.ms/OfficeSecurityReleases","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:microsoft-office-2019:19.0.0:https://aka.ms/OfficeSecurityReleases"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-office-ltsc-2021","product_name":"Microsoft Office LTSC 2021","version_start":"16.0.1","version_start_inclusive":true,"version_end":"https://aka.ms/OfficeSecurityReleases","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:microsoft-office-ltsc-2021:16.0.1:https://aka.ms/OfficeSecurityReleases"}],"exploit_refs":[],"news":[],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2024-02-13T18:02:24.799000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2025-02-06T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"cvss_changed","at":"2026-06-28T17:33:49.133192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:33:49.133192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:33:49.133192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:52:20.328657Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:52:20.328657Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:52:20.328657Z","label":"SSVC decision revised","source":"vulnrichment"}]}