{"id":"CVE-2026-20585","kind":"vulnerability","aliases":["CVE-2026-20585"],"related":[],"title":"Modem: out-of-bounds write lets a rogue base station escalate privilege","description":"In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, 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: MOLY01338165; Issue ID: MSV-9660.","summary":"A missing bounds check in the modem firmware allows an out-of-bounds write. A phone or device that connects to an attacker-controlled rogue base station can be pushed into a privilege escalation without user interaction.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cellular","infrastructure","mobile","modem"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T03:17:36+00:00","first_seen_at":"2026-11-02T03:31:26+00:00","triaged_at":"2026-11-02T03:32:12+00:00","updated_at":"2026-11-02T03:32:12+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-02T03:32:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Modem: out-of-bounds write lets a rogue base station escalate privilege","impact":"high","summary":"A missing bounds check in the modem firmware allows an out-of-bounds write. A phone or device that connects to an attacker-controlled rogue base station can be pushed into a privilege escalation without user interaction.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["modem","cellular","mobile"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker escalates privilege on a device that connects to a rogue base station","analyst_note":"Identify the affected modem chipset and device models and the patch level for Patch ID MOLY01338165 (MediaTek advisory) from the NVD entry's references.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Devices with the affected modem firmware that connect to cellular networks. The sources do not name the affected device models or the patched firmware versions. The attack needs a rogue base station, so exposure depends on the device's radio and modem stack rather than on any setting the user chooses.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00064,"input_tokens":4122,"output_tokens":455,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-20585':16A,19A '-9660':120C 'addit':103C 'allow':32B 'attack':48B,100C 'attacker-control':47B 'base':10A,51B,95C 'bound':5A,26B,37B,71C,77C 'cellular':20B 'check':27B,78C 'connect':44B,91C 'control':49B,97C 'could':80C 'cve':14A,17A 'devic':42B 'due':73C 'escal':12A,59B,84C 'execut':104C 'exploit':113C 'firmwar':31B 'id':115C,118C 'infrastructur':21B 'interact':62B,108C 'issu':117C 'lead':81C 'let':7A 'miss':25B,76C 'mobil':22B 'modem':1A,23B,30B,64C 'moly01338165':116C 'msv':119C 'need':106C,111C 'out-of-bound':2A,34B 'patch':114C 'phone':40B 'possibl':68C 'privileg':13A,58B,86C,105C 'push':55B 'remot':83C 'rogu':9A,50B,94C 'station':11A,52B,96C 'ue':89C 'user':61B,107C 'without':60B 'write':6A,38B,72C","nicknames":[],"mitigations":[],"who_affected":"Devices with the affected modem firmware that connect to cellular networks. The sources do not name the affected device models or the patched firmware versions. The attack needs a rogue base station, so exposure depends on the device's radio and modem stack rather than on any setting the user chooses.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["cellular","infrastructure","mobile","modem","unknown"],"first_public_at":"2026-11-02T03:17:36+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-20585","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20585","severity":null,"published_at":"2026-11-02T03:17:36+00:00","modified_at":"2026-11-02T03:17:36+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"}