{"id":"CVE-2026-20563","kind":"vulnerability","aliases":["CVE-2026-20563"],"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 an incorrect 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: MOLY01777997; Issue ID: MSV-8905.","summary":"A bounds-check error in the modem firmware allows an out-of-bounds write. A phone (UE) that connects to an attacker-controlled rogue base station can be remotely denied service.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","cellular","infrastructure","mobile-modem"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T03:17:33+00:00","first_seen_at":"2026-11-02T03:31:25+00:00","triaged_at":"2026-11-02T03:32:30+00:00","updated_at":"2026-11-02T03:32:30+00:00","category":"infrastructure","confidence":0.5,"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 bounds-check error in the modem firmware allows an out-of-bounds write. A phone (UE) that connects to an attacker-controlled rogue base station can be remotely denied service.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["mobile-modem","android","cellular"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Remote denial of service on a device connected to a rogue base station","analyst_note":"Confirm affected chipsets and fixed firmware or OS patch level from the NVD entry and the vendor's security bulletin for MSV-8905.","how_to_check":"- unknown","plain_action":"Update your phone's software to the latest version from your phone maker once a patch is released; the sources do not name a fixed version.","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Phones and devices with the affected modem firmware that can connect to a cellular network. The sources describe exposure when a device connects to a rogue base station; they do not list specific models or versions. unknown for the rest.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000643,"input_tokens":4123,"output_tokens":462,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-20563':17A,20A '-8905':118C 'addit':101C 'allow':36B 'android':21B 'attack':51B,98C 'attacker-control':50B 'base':10A,54B,93C 'bound':5A,29B,41B,69C,75C 'bounds-check':28B 'cellular':22B 'check':30B,76C 'connect':47B,89C 'control':52B,95C 'could':78C 'crash':12A 'cve':15A,18A 'deni':59B 'denial':82C 'due':71C 'error':31B 'execut':102C 'exploit':111C 'firmwar':35B 'id':113C,116C 'incorrect':74C 'infrastructur':23B 'interact':106C 'issu':115C 'lead':79C 'let':7A 'mobil':25B 'mobile-modem':24B 'modem':1A,26B,34B,62C 'moly01777997':114C 'msv':117C 'need':104C,109C 'out-of-bound':2A,38B 'patch':112C 'phone':14A,44B 'possibl':66C 'privileg':103C 'remot':58B,81C 'rogu':9A,53B,92C 'servic':60B,84C 'station':11A,55B,94C 'ue':45B,87C 'user':105C 'write':6A,42B,70C","nicknames":[],"mitigations":[],"who_affected":"Phones and devices with the affected modem firmware that can connect to a cellular network. The sources describe exposure when a device connects to a rogue base station; they do not list specific models or versions. unknown for the rest.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"everyone","plain_action":"Update your phone's software to the latest version from your phone maker once a patch is released; the sources do not name a fixed version.","pkeys":[],"ptokens":[],"labels":["android","cellular","infrastructure","mobilemodem","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-2026-20563","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20563","severity":null,"published_at":"2026-11-02T03:17:33+00:00","modified_at":"2026-11-02T03:17:33+00:00","first_seen_at":"2026-11-02T03:31:25+00:00","fetched_at":"2026-11-02T03:31:25+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"}