{"id":"CVE-2026-20593","kind":"vulnerability","aliases":["CVE-2026-20593"],"related":[],"title":"Modem: improper input validation lets a rogue base station crash the modem","description":"In Modem, there is a possible application crash due to improper input validation. 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: MOLY01707455; Issue ID: MSV-9503.","summary":"A flaw in the modem firmware's input validation can crash the modem application when a phone or device connects to a rogue base station. An attacker running such a base station can cause a remote denial of service without credentials or user action.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","mobile-devices","modem","runtime"],"not_affected_if":["unknown"],"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":"2026-11-02T03:32:09+00:00","updated_at":"2026-11-02T03:32:09+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-02T03:32:09Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Modem: improper input validation lets a rogue base station crash the modem","impact":"low","summary":"A flaw in the modem firmware's input validation can crash the modem application when a phone or device connects to a rogue base station. An attacker running such a base station can cause a remote denial of service without credentials or user action.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["modem","mobile-devices","android"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Modem crashes, causing remote denial of service for the device","analyst_note":"Find the affected MediaTek modem firmware versions and the Android security bulletin entry that lists the patch ID MOLY01707455 and issue MSV-9503.","how_to_check":"unknown","plain_action":"Install the latest phone software update from your device maker once it is released, since the sources name a patch ID but no fixed version.","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Devices with the affected modem firmware that connect to cellular networks are exposed when they attach to an attacker-controlled base station. The sources do not name the affected device models or the fixed firmware versions. Devices kept off untrusted cellular networks are not reachable this way.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000654,"input_tokens":4109,"output_tokens":486,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-20593':15A,18A '-9503':123C 'action':68B 'addit':106C 'android':19B 'applic':38B,75C 'attack':51B,103C 'base':8A,48B,55B,98C 'caus':58B 'connect':44B,94C 'control':100C 'could':83C 'crash':10A,35B,76C 'credenti':65B 'cve':13A,16A 'denial':61B,87C 'devic':22B,43B 'due':77C 'execut':107C 'exploit':116C 'firmwar':30B 'flaw':26B 'id':118C,121C 'improp':2A,79C 'input':3A,32B,80C 'interact':111C 'issu':120C 'lead':84C 'let':5A 'mobil':21B 'mobile-devic':20B 'modem':1A,12A,23B,29B,37B,70C 'moly01707455':119C 'msv':122C 'need':109C,114C 'patch':117C 'phone':41B 'possibl':74C 'privileg':108C 'remot':60B,86C 'rogu':7A,47B,97C 'run':52B 'runtim':24B 'servic':63B,89C 'station':9A,49B,56B,99C 'ue':92C 'user':67B,110C 'valid':4A,33B,81C 'without':64B","nicknames":[],"mitigations":[],"who_affected":"Devices with the affected modem firmware that connect to cellular networks are exposed when they attach to an attacker-controlled base station. The sources do not name the affected device models or the fixed firmware versions. Devices kept off untrusted cellular networks are not reachable this way.","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 a patch ID but no fixed version.","pkeys":[],"ptokens":[],"labels":["android","mobiledevices","modem","runtime","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-2026-20593","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20593","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"}