{"id":"CVE-2025-66366","kind":"vulnerability","aliases":["CVE-2025-66366"],"related":[],"title":"Baseband crash from malformed unauthenticated downlink RRC Setup message","description":"Incorrect handling of unauthenticated downlink RRC Setup messages can cause the baseband to crash","summary":"The baseband handles unauthenticated downlink RRC Setup messages incorrectly, so a crafted message from a cellular network can crash it. The sources describe only a crash; no code execution or data access is stated.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["baseband","cellular-modem","other"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-05T03:17:17+00:00","first_seen_at":"2026-11-05T03:31:40+00:00","triaged_at":"2026-11-05T03:33:55+00:00","updated_at":"2026-11-05T03:33:55+00:00","category":"other","confidence":0.3,"triage":{"at":"2026-11-05T03:33:55Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Baseband crash from malformed unauthenticated downlink RRC Setup message","impact":"low","summary":"The baseband handles unauthenticated downlink RRC Setup messages incorrectly, so a crafted message from a cellular network can crash it. The sources describe only a crash; no code execution or data access is stated.","audience":"everyone","category":"other","nicknames":[],"who_cares":["baseband","cellular-modem"],"confidence":0.3,"fix_status":"unknown","needs_auth":"no","worst_case":"Baseband modem crashes, dropping cellular connectivity","analyst_note":"Identify the affected vendor and devices from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2025-66366 and find the vendor bulletin with fixed versions.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000605,"input_tokens":4150,"output_tokens":379,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2025':11A,14A '-66366':12A,15A 'access':51B 'baseband':1A,16B,21B,65C 'caus':63C 'cellular':18B,35B 'cellular-modem':17B 'code':47B 'craft':31B 'crash':2A,38B,45B,67C 'cve':10A,13A 'data':50B 'describ':42B 'downlink':6A,24B,58C 'execut':48B 'handl':22B,55C 'incorrect':28B,54C 'malform':4A 'messag':9A,27B,32B,61C 'modem':19B 'network':36B 'rrc':7A,25B,59C 'setup':8A,26B,60C 'sourc':41B 'state':53B 'unauthent':5A,23B,57C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["baseband","cellularmodem","other","unknown"],"campaign_type":null,"first_public_at":"2026-11-05T03:17:17+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2025-66366","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66366","severity":null,"published_at":"2026-11-05T03:17:17+00:00","modified_at":"2026-11-05T03:17:17+00:00","first_seen_at":"2026-11-05T03:31:40+00:00","fetched_at":"2026-11-05T03:31:40+00:00","note":null}],"documents":[],"exploit_sources":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}