{"id":"CVE-2021-25337","kind":"vulnerability","aliases":["CVE-2021-25337"],"related":[],"title":"samsung android: Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows…","description":"Samsung mobile devices contain an improper access control vulnerability in clipboard service which allows untrusted applications to read or write arbitrary files. This vulnerability was chained with CVE-2021-25369 and CVE-2021-25370.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Samsung mobile devices have an improper access control flaw in the clipboard service that lets untrusted apps read or write arbitrary files. It was chained with CVE-2021-25369 and CVE-2021-25370, and CISA lists it as exploited in the wild.","severity":"high","cvss":7.1,"epss":null,"exploited":true,"exploited_at":"2022-11-08T00:00:00+00:00","products":[{"name":"Samsung Mobile Devices","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"samsung android","fixed":[],"affected":"= 9.0","ecosystem":"vendor"},{"name":"samsung android","fixed":[],"affected":"= 10.0","ecosystem":"vendor"},{"name":"samsung android","fixed":[],"affected":"= 11.0","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["android","exploited","mobile-fleet","samsung","vendor"],"not_affected_if":["non-samsung-devices"],"how_to_check":"Settings > Software update > check the security patch level on each Samsung device; unknown whether the sources give a specific build number.","fix":"Apply the Samsung security update for your device model per vendor instructions; the sources do not name a specific patched version.","status":"open","published_at":"2021-03-04T21:15:13+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:08:58+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:08:58Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Samsung security update for your device model per vendor instructions; the sources do not name a specific patched version.","reach":"local","impact":"high","summary":"Samsung mobile devices have an improper access control flaw in the clipboard service that lets untrusted apps read or write arbitrary files. It was chained with CVE-2021-25369 and CVE-2021-25370, and CISA lists it as exploited in the wild.","category":"vendor","who_cares":["samsung","android","mobile-fleet"],"confidence":0.6,"needs_auth":"no","worst_case":"Untrusted app reads or writes arbitrary files on the phone","analyst_note":"Find Samsung's bulletin for CVE-2021-25337 to get affected models and patched patch levels; the sources give neither.","how_to_check":"Settings > Software update > check the security patch level on each Samsung device; unknown whether the sources give a specific build number.","needs_analyst":true,"not_affected_if":["non-samsung-devices"],"user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000473,"input_tokens":2824,"output_tokens":382,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2021':17A,22A,25A,70B,74B,113C,117C '-25337':23A,26A '-25369':71B,114C '-25370':75B,118C '1':19A 'access':4A,49B,91C 'action':121C 'allow':20A,98C 'android':2A,31A,33A,35A,36B 'app':59B 'appli':122C 'applic':100C 'arbitrari':63B,105C 'chain':67B,110C 'cisa':77B,119C 'clipboard':7A,54B,95C 'contain':88C 'control':5A,50B,92C 'cve':21A,24A,69B,73B,112C,116C 'devic':12A,45B,87C 'devices':29A 'exploit':37B,81B 'file':64B,106C 'flaw':51B 'fleet':40B 'improp':3A,48B,90C 'instruct':126C 'let':57B 'list':78B 'mar':16A 'mobil':11A,39B,44B,86C 'mobile':28A 'mobile-fleet':38B 'per':124C 'prior':13A 'read':60B,102C 'releas':18A 'requir':120C 'samsung':1A,10A,27A,30A,32A,34A,41B,43B,85C 'servic':8A,55B,96C 'smr':15A 'untrust':58B,99C 'updat':123C 'vendor':42B,125C 'vulner':93C,108C 'wild':84B 'write':62B,104C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-03-04T21:15:13+00:00","kev":{"dateAdded":"2022-11-08","dueDate":"2022-11-29","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cvss_by":"mobile.security@samsung.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-25337","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-25337","severity":null,"published_at":"2022-11-08T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T15:39:42+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-25337","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25337","severity":null,"published_at":"2021-03-04T21:15:13+00:00","modified_at":"2026-06-17T03:41:53+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}