{"id":"CVE-2021-25337","published":"2021-03-04T21:15:13Z","modified":"2026-06-17T03:41:53Z","title":"Samsung Mobile Devices Improper Access Control Vulnerability","vendor":"Samsung","product":"Mobile Devices","tier":"core","eol":null,"description":{"text":"Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an improper access control issue in the clipboard service of Samsung Mobile Devices, affecting releases prior to SMR Mar-2021 Release 1. Exploitation requires a local attack vector, with no privileges needed but user interaction required, and a malicious or untrusted application could then read or write certain local files.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:24Z"},"cvss":{"score":7.1,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.02807,"percentile":0.8647,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2022-11-08","dueDate":"2022-11-29","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://security.samsungmobile.com/securityUpdate.smsb; https://nvd.nist.gov/vuln/detail/CVE-2021-25337","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-11-03","exploitedFirstSeen":"2020-11-03","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2020-11-03"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-11-08"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-269","name":"Improper Privilege Management"}],"references":[{"url":"https://security.samsungmobile.com","tags":["Vendor Advisory"]},{"url":"https://security.samsungmobile.com/securityUpdate.smsb","tags":["Vendor Advisory"]},{"url":"https://security.samsungmobile.com","tags":["Vendor Advisory"]},{"url":"https://security.samsungmobile.com/securityUpdate.smsb","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25337","tags":["US Government Resource"]}],"techniques":[{"id":"T1204.002","name":"Malicious File","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Malicious app run by user triggers access","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"untrusted applications to read or write certain local files","start":110,"end":169}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1005","name":"Data from Local System","tactics":["collection"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Read local files via clipboard service","mappingType":"primary_impact","evidence":[{"from":"description","quote":"untrusted applications to read or write certain local files","start":110,"end":169}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-12233","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12233","exploited":true,"exploitedSince":"2022-11-08","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-04-17","earliestUrl":"https://github.com/CrisZalSa/JustALampNothingElse","repos":[{"name":"CrisZalSa/JustALampNothingElse","url":"https://github.com/CrisZalSa/JustALampNothingElse","stars":1,"created":"2026-04-17"}]},"first":{"date":"2026-04-17","source":"PoC-in-GitHub","url":"https://github.com/CrisZalSa/JustALampNothingElse"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1204.002"],"provenance":"ai"},{"stage":"primary","techniques":["T1005"],"provenance":"ai"}],"timeline":[{"date":"2020-11-03","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV 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KEV listing","points":0.0,"detail":"added 2186 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":17.29,"detail":"percentile 0.8647"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":4.97,"detail":"base score 7.1"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-samsung-mobile-devices-cwe-269"}}