{"id":"CVE-2026-20555","kind":"vulnerability","aliases":["CVE-2026-20555"],"related":[],"title":"Modem: out-of-bounds read lets a rogue base station crash the 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: MOLY01876664; Issue ID: MSV-9834.","summary":"A modem flaw in the cellular stack lets a device that has connected to a rogue base station be knocked offline through an out-of-bounds memory read. The sources describe a remote denial of service with no extra privileges and no user interaction needed.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cellular","infrastructure","mobile","modem"],"not_affected_if":["unknown"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T03:17:32+00:00","first_seen_at":"2026-11-02T03:31:24+00:00","triaged_at":"2026-11-02T03:32:37+00:00","updated_at":"2026-11-02T03:32:37+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-02T03:32:37Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"Modem: out-of-bounds read lets a rogue base station crash the phone","impact":"low","summary":"A modem flaw in the cellular stack lets a device that has connected to a rogue base station be knocked offline through an out-of-bounds memory read. The sources describe a remote denial of service with no extra privileges and no user interaction needed.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["modem","cellular","mobile"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Device modem crashes, causing remote denial of service for the phone","analyst_note":"Find the vendor bulletin for patch ID MOLY01876664 / issue MSV-9834 to name affected devices and the fixed software version.","how_to_check":"- unknown","plain_action":"Install the latest phone software update from your device maker once it is released, since the sources name no version to move to.","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Devices with a cellular modem that can connect to a rogue base station, such as a fake cell tower set up by an attacker. The sources do not name affected products or chipsets beyond the Modem component and patch ID MOLY01876664. Whether a given device is affected is unknown.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000658,"input_tokens":4119,"output_tokens":493,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-20555':17A,20A '-9834':128C 'addit':111C 'attack':108C 'base':10A,41B,103C 'bound':5A,51B,79C,85C 'cellular':21B,30B 'check':86C 'connect':37B,99C 'control':105C 'could':88C 'crash':12A 'cve':15A,18A 'denial':59B,92C 'describ':56B 'devic':34B 'due':81C 'execut':112C 'exploit':121C 'extra':64B 'flaw':27B 'id':123C,126C 'infrastructur':22B 'interact':69B,116C 'issu':125C 'knock':44B 'lead':89C 'let':7A,32B 'memori':52B 'miss':84C 'mobil':23B 'modem':1A,24B,26B,72C 'moly01876664':124C 'msv':127C 'need':70B,114C,119C 'offlin':45B 'out-of-bound':2A,48B 'patch':122C 'phone':14A 'possibl':76C 'privileg':65B,113C 'read':6A,53B,80C 'remot':58B,91C 'rogu':9A,40B,102C 'servic':61B,94C 'sourc':55B 'stack':31B 'station':11A,42B,104C 'ue':97C 'user':68B,115C","nicknames":[],"mitigations":[],"who_affected":"Devices with a cellular modem that can connect to a rogue base station, such as a fake cell tower set up by an attacker. The sources do not name affected products or chipsets beyond the Modem component and patch ID MOLY01876664. Whether a given device is affected is unknown.","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, since the sources name no version to move to.","pkeys":[],"ptokens":[],"labels":["cellular","infrastructure","mobile","modem","unknown"],"first_public_at":"2026-11-02T03:17:32+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-20555","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20555","severity":null,"published_at":"2026-11-02T03:17:32+00:00","modified_at":"2026-11-02T03:17:32+00:00","first_seen_at":"2026-11-02T03:31:24+00:00","fetched_at":"2026-11-02T03:31:24+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"}