{"cve":{"cve_id":"CVE-2026-65400","is_kev":true,"kev_date_added":"2026-08-18","kev_vendor_project":"Apple","kev_product":"macOS","kev_vulnerability_name":"Apple macOS Improper Authentication Vulnerability","kev_short_description":"Apple macOS contains an improper authentication vulnerability that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials.","kev_required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (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.","kev_due_date":"2026-08-21","kev_known_ransomware":false,"kev_notes":"https://support.apple.com/en-us/148170; https://support.apple.com/en-us/148171; https://support.apple.com/en-us/148172 ; 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-2026-65400","kev_cwes":["CWE-287"],"epss_score":0.09905,"epss_percentile":0.95215,"epss_as_of":"2026-08-26","description":"An authentication issue was addressed with improved state management. This issue is fixed in macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.","published_at":"2026-08-06T18:17:18.263000Z","last_modified_at":"2026-08-19T04:17:34.547000Z","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","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-287"],"nvd_references":["https://support.apple.com/en-us/148170","https://support.apple.com/en-us/148171","https://support.apple.com/en-us/148172"],"vuln_status":"Analyzed","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":"2026-08-06T23:16:49.995541Z","updated_at":"2026-08-19T16:41:57.515079Z"},"effective_severity":"CRITICAL","badges":["kev","news"],"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"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"apple","vendor_name":"Apple","product_slug":"macos","product_name":"macOS","version_start":"0","version_start_inclusive":true,"version_end":"14.8.9","version_end_inclusive":false,"cpe23_uri":"cve5:apple:macos:0:14.8.9"},{"vendor_slug":"apple","vendor_name":"Apple","product_slug":"macos","product_name":"macOS","version_start":"0","version_start_inclusive":true,"version_end":"15.7.9","version_end_inclusive":false,"cpe23_uri":"cve5:apple:macos:0:15.7.9"},{"vendor_slug":"apple","vendor_name":"Apple","product_slug":"macos","product_name":"macOS","version_start":"0","version_start_inclusive":true,"version_end":"26.6.1","version_end_inclusive":false,"cpe23_uri":"cve5:apple:macos:0:26.6.1"},{"vendor_slug":"apple","vendor_name":"Apple","product_slug":"macos","product_name":"macOS","version_start":"14.0","version_start_inclusive":true,"version_end":"14.8.9","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[{"id":1276,"source":"The Hacker News","url":"https://thehackernews.com/2026/08/critical-macos-sharepoint-vcenter-and.html","title":"Critical macOS, SharePoint, vCenter, and Microsoft IKE Flaws Under Active Exploitation","summary":"The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added four critical vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, stating they are being exploited in the wild.\n\nThe shortcomings added to the KEV catalog are listed below -\n\n\n  CVE-2026-65400 (CVSS score: 9.8) - An improper authentication vulnerability impacting Apple macOS that could allow an","thumbnail_url":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJDdcdHtgq-nTzruVpw0hyZmBZtfG4iwLgi_nfw6A70e_mXt7LUSnyTQ7ZdgclMUypEe7s8s-LDmykPATeFixDXHEP_j1zhheNBnHA1TebBqoYtw1-3g_-LqlSuk8MczmJ3BtD6MO4TL1FVdLEcZXVKn_Rd7ucsm0Imb8QTjxJXZY52RkgfUd26FPQanbZ/s1600/kev.jpg","author":"info@thehackernews.com (The Hacker News)","published_at":"2026-08-19T11:01:48Z","fetched_at":"2026-08-19T12:10:27.756177Z","trending_score":0.07459025723445283,"cve_ids":["CVE-2026-65400"]},{"id":1214,"source":"The Hacker News","url":"https://thehackernews.com/2026/08/apple-macos-screen-sharing-flaw.html","title":"Apple macOS Screen Sharing Flaw Exploited on Internet-Exposed Macs to Install Monero Miner","summary":"A recently patched security flaw in Apple macOS has come under active exploitation in the wild to deploy a cryptocurrency miner, the Netherlands National Cyber Security Centre (NCSC) has warned.\n\nThe vulnerability in question is CVE-2026-65400 (CVSS score: 9.8), a critical authentication issue impacting the Screen Sharing component that could allow an attacker already on the network to","thumbnail_url":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhudlXOxVGnImI0OoIDMwrIy0pc2zaf1aV0B4ga_QSrt5UPX5G_BJl76VvdEUxkxJ4pjopKLsohJrwVwBgS0a-xLJvW7ZvCPvG3ezz_5vY1ABYZnysPR-ZFvVlEXVdZkCWuuHp2IAra5N3IgH_Lf8wuwVF7hx4zYXf0qF7MyOC8M83ZpQVQ5jcjzbLP4Jq/s1600/apple-screenshare.jpg","author":"info@thehackernews.com (The Hacker News)","published_at":"2026-08-15T07:24:04Z","fetched_at":"2026-08-17T11:07:44.972292Z","trending_score":0.017695534631232333,"cve_ids":["CVE-2026-65400"]}],"references":[{"url":"https://support.apple.com/en-us/148170","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://support.apple.com/en-us/148171","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://support.apple.com/en-us/148172","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-08-06T18:17:18.263000Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-08-07T01:17:50.024855Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-07T01:17:50.024855Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-07T01:17:50.024855Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-07T01:17:50.024855Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-07T01:17:50.024855Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-07T01:17:50.024855Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-15T05:38:17.687040Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-15T05:38:17.687040Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-15T05:38:17.687040Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-15T05:38:17.687040Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"first_article","at":"2026-08-15T07:24:04Z","label":"First news coverage","source":"The Hacker News"},{"type":"ssvc_changed","at":"2026-08-17T13:40:44.495097Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cisa_reported","at":"2026-08-18T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-08-18T20:43:27.518524Z","label":"SSVC decision revised","source":"vulnrichment"}]}