{"cve_id":"CVE-2024-39891","published":"2024-07-02T18:15:03.447000+00:00","last_modified":"2026-06-17T07:42:58.630000+00:00","vuln_status":"Analyzed","description":"In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","base_score":5.3,"base_severity":"MEDIUM","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"LOW","impact_i":"NONE","impact_a":"NONE","cwe_ids":["CWE-203"],"in_kev":true,"kev_date_added":"2024-07-23","kev_ransomware":false,"epss_score":0.01669,"epss_percentile":0.76782,"cap_rule_version":"0.1.1","stage":"RECON","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"NONE","caps":["INFO_DISCLOSURE"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T11:08:27.653468+00:00","first_seen":"2024-07-02T18:15:03.447000+00:00","kev_first_seen":"2024-07-23T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["twilio"],"products":["authy","authy_authenticator"],"affected":[{"vendor":"twilio","product":"authy","ranges":["< 26.1.0"]},{"vendor":"twilio","product":"authy_authenticator","ranges":["< 25.1.0"]}]}