{"cve":{"cve_id":"CVE-2025-40780","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.0041,"epss_percentile":0.32639,"epss_as_of":"2026-06-23","description":"In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use.\nThis issue affects BIND 9 versions 9.16.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.16.8-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.","published_at":"2025-10-22T15:48:27.146000Z","last_modified_at":null,"cvss_v3_score":8.6,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-341"],"nvd_references":["https://kb.isc.org/docs/cve-2025-40780"],"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":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:26:53.888276Z"},"effective_severity":"HIGH","badges":[],"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":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.16.0","version_start_inclusive":true,"version_end":"9.16.50","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.16.0:9.16.50"},{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.18.0","version_start_inclusive":true,"version_end":"9.18.39","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.18.0:9.18.39"},{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.20.0","version_start_inclusive":true,"version_end":"9.20.13","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.20.0:9.20.13"},{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.21.0","version_start_inclusive":true,"version_end":"9.21.12","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.21.0:9.21.12"},{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.16.8-S1","version_start_inclusive":true,"version_end":"9.16.50-S1","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.16.8-S1:9.16.50-S1"},{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.18.11-S1","version_start_inclusive":true,"version_end":"9.18.39-S1","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.18.11-S1:9.18.39-S1"},{"vendor_slug":"isc","vendor_name":"ISC","product_slug":"bind-9","product_name":"BIND 9","version_start":"9.20.9-S1","version_start_inclusive":true,"version_end":"9.20.13-S1","version_end_inclusive":true,"cpe23_uri":"cve5:isc:bind-9:9.20.9-S1:9.20.13-S1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://kb.isc.org/docs/cve-2025-40780","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2025-10-22T15:48:27.146000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:46:04.492182Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:46:04.492182Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:46:04.492182Z","label":"CVSS score revised","source":"cvelistv5"}]}