{"schema":"threatline.record/2","record":{"id":"CVE-2026-65400","aliases":[],"summary":"Apple macOS Improper Authentication Vulnerability","details":"Apple macOS contains an improper authentication vulnerability that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials.","categories":["Operating systems"],"product":"macOS","vendor":"Apple","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","source_modified_at":"2026-09-14T20:48:37.949Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"macOS","vendor":"Apple","versions":[{"lessThan":"14.8.9","status":"affected","version":"0","versionType":"custom"},{"lessThan":"15.7.9","status":"affected","version":"0","versionType":"custom"},{"lessThan":"26.6.1","status":"affected","version":"0","versionType":"custom"},{"lessThan":"26.7","status":"affected","version":"0","versionType":"custom"},{"lessThan":"27","status":"affected","version":"0","versionType":"custom"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","source_modified_at":"2026-09-14T20:48:37.949Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"macOS","ecosystem":null},"version":"14.8.9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","source_modified_at":"2026-09-14T20:48:37.949Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"macOS","ecosystem":null},"version":"15.7.9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","source_modified_at":"2026-09-14T20:48:37.949Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"macOS","ecosystem":null},"version":"26.6.1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","source_modified_at":"2026-09-14T20:48:37.949Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"macOS","ecosystem":null},"version":"26.7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","source_modified_at":"2026-09-14T20:48:37.949Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"macOS","ecosystem":null},"version":"27","basis":"first unaffected version stated in the CVE record"}],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2026-08-18","due_date":"2026-08-21","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.","ransomware_campaign_use":"Unknown","forensic_triage":true},"epss":{"probability":0.01723,"percentile":0.77346,"score_date":"2026-10-23"},"published_at":"2026-08-06T18:17:18.263Z","modified_at":"2026-09-14T20:48:37.949Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-65400","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-09-14T20:48:37.949Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-65400","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://support.apple.com/en-us/148170"},{"source":"CVE List","url":"https://support.apple.com/en-us/148171"},{"source":"CVE List","url":"https://support.apple.com/en-us/148172"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65400","source":"CISA KEV"},{"source":"CVE List","url":"https://support.apple.com/en-us/149035"},{"source":"CVE List","url":"https://support.apple.com/en-us/149042"},{"source":"CVE List","url":"https://advisories.ncsc.nl/2026/ncsc-2026-0280.html","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65400","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2026-08-14T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-14T20:48:37.949Z","content_hash":"cf7d2b88f51c2fc926d9b585a06ca7f1fbd6f1af01a553b862d1ecc9e7fdddb9"}}