{"id":"CVE-2026-20597","kind":"vulnerability","aliases":["CVE-2026-20597"],"related":[],"title":"Modem: out-of-bounds read lets a rogue base station crash a phone","description":"In Modem, there is a possible out of bounds read due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01758223; Issue ID: MSV-8909.","summary":"A missing bounds check in the modem firmware lets it read memory outside its buffer. A device that connects to an attacker-controlled rogue base station can be knocked offline by remote denial of service.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cellular-modem","infrastructure","mobile-devices"],"not_affected_if":["unknown"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T03:17:37+00:00","first_seen_at":"2026-11-02T03:31:26+00:00","triaged_at":"2026-11-02T03:32:05+00:00","updated_at":"2026-11-02T03:32:05+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-02T03:32:05Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Modem: out-of-bounds read lets a rogue base station crash a phone","impact":"low","summary":"A missing bounds check in the modem firmware lets it read memory outside its buffer. A device that connects to an attacker-controlled rogue base station can be knocked offline by remote denial of service.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["mobile-devices","cellular-modem"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"remote denial of service from a rogue base station","analyst_note":"Check the vendor's bulletin for affected modem versions and the patch ID MOLY01758223 at the NVD entry.","how_to_check":"unknown","plain_action":"Install the latest phone software update from your device maker once it is released; the sources do not name a fixed version.","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Devices with the affected modem firmware that can connect to cellular networks are exposed if they connect to a rogue base station. The sources do not name specific device models or modem versions. Devices that never attach to an untrusted cell are less exposed.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000639,"input_tokens":4119,"output_tokens":454,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-20597':17A,20A '-8909':121C 'addit':104C 'attack':50B,101C 'attacker-control':49B 'base':10A,53B,96C 'bound':5A,30B,72C,78C 'buffer':42B 'cellular':22B 'cellular-modem':21B 'check':31B,79C 'connect':46B,92C 'control':51B,98C 'could':81C 'crash':12A 'cve':15A,18A 'denial':61B,85C 'devic':27B,44B 'due':74C 'execut':105C 'exploit':114C 'firmwar':35B 'id':116C,119C 'infrastructur':24B 'interact':109C 'issu':118C 'knock':57B 'lead':82C 'let':7A,36B 'memori':39B 'miss':29B,77C 'mobil':26B 'mobile-devic':25B 'modem':1A,23B,34B,65C 'moly01758223':117C 'msv':120C 'need':107C,112C 'offlin':58B 'out-of-bound':2A 'outsid':40B 'patch':115C 'phone':14A 'possibl':69C 'privileg':106C 'read':6A,38B,73C 'remot':60B,84C 'rogu':9A,52B,95C 'servic':63B,87C 'station':11A,54B,97C 'ue':90C 'user':108C","nicknames":[],"mitigations":[],"who_affected":"Devices with the affected modem firmware that can connect to cellular networks are exposed if they connect to a rogue base station. The sources do not name specific device models or modem versions. Devices that never attach to an untrusted cell are less exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"everyone","plain_action":"Install the latest phone software update from your device maker once it is released; the sources do not name a fixed version.","pkeys":[],"ptokens":[],"labels":["cellularmodem","infrastructure","mobiledevices","unknown"],"first_public_at":"2026-11-02T03:17:37+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-20597","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20597","severity":null,"published_at":"2026-11-02T03:17:37+00:00","modified_at":"2026-11-02T03:17:37+00:00","first_seen_at":"2026-11-02T03:31:26+00:00","fetched_at":"2026-11-02T03:31:26+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}