{"id":"CVE-2026-20562","kind":"vulnerability","aliases":["CVE-2026-20562"],"related":[],"title":"Modem: out-of-bounds write lets a rogue base station crash the phone","description":"In Modem, there is a possible out of bounds write 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: MOLY01775984; Issue ID: MSV-8907.","summary":"A missing bounds check in the modem firmware allows an out-of-bounds write. A device that connects to an attacker-controlled rogue base station can be knocked offline remotely.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cellular","infrastructure","mobile-devices","modem"],"not_affected_if":["unknown"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T03:17:33+00:00","first_seen_at":"2026-11-02T03:31:24+00:00","triaged_at":"2026-11-02T03:32:30+00:00","updated_at":"2026-11-02T03:32:30+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-02T03:32:30Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"Modem: out-of-bounds write lets a rogue base station crash the phone","impact":"low","summary":"A missing bounds check in the modem firmware allows an out-of-bounds write. A device that connects to an attacker-controlled rogue base station can be knocked offline remotely.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["modem","mobile-devices","cellular"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Remote denial of service: the device's modem stops working","analyst_note":"Check the vendor bulletin for affected devices and patch level; the NVD entry alone does not name products or versions.","how_to_check":"- unknown","plain_action":"Update your phone to the latest security patch from its vendor, as soon as one is available.","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Devices with the affected Modem firmware that connect to cellular networks. An attacker needs to operate a rogue base station that the device connects to. The sources do not name the affected devices or versions.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000627,"input_tokens":4119,"output_tokens":431,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-20562':17A,20A '-8907':116C 'addit':99C 'allow':35B 'attack':49B,96C 'attacker-control':48B 'base':10A,52B,91C 'bound':5A,29B,40B,67C,73C 'cellular':21B 'check':30B,74C 'connect':45B,87C 'control':50B,93C 'could':76C 'crash':12A 'cve':15A,18A 'denial':80C 'devic':25B,43B 'due':69C 'execut':100C 'exploit':109C 'firmwar':34B 'id':111C,114C 'infrastructur':22B 'interact':104C 'issu':113C 'knock':56B 'lead':77C 'let':7A 'miss':28B,72C 'mobil':24B 'mobile-devic':23B 'modem':1A,26B,33B,60C 'moly01775984':112C 'msv':115C 'need':102C,107C 'offlin':57B 'out-of-bound':2A,37B 'patch':110C 'phone':14A 'possibl':64C 'privileg':101C 'remot':58B,79C 'rogu':9A,51B,90C 'servic':82C 'station':11A,53B,92C 'ue':85C 'user':103C 'write':6A,41B,68C","nicknames":[],"mitigations":[],"who_affected":"Devices with the affected Modem firmware that connect to cellular networks. An attacker needs to operate a rogue base station that the device connects to. The sources do not name the affected devices or versions.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["cellular","infrastructure","mobiledevices","modem","unknown"],"first_public_at":"2026-11-02T03:17:33+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-20562","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20562","severity":null,"published_at":"2026-11-02T03:17:33+00:00","modified_at":"2026-11-02T03:17:33+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"}