{"id":"CVE-2021-25372","published":"2021-03-26T19:15:12Z","modified":"2026-06-17T03:41:57Z","title":"Samsung Mobile Devices Improper Boundary Check Vulnerability","vendor":"Samsung","product":"Mobile Devices","tier":"core","eol":null,"description":{"text":"An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an improper boundary check in the DSP driver of Samsung Mobile Devices, which allows out-of-bounds memory access. An attacker with local access and high privileges can trigger this memory access without any user interaction, which the vector indicates is needed for the flaw to be reached.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:59Z"},"cvss":{"score":6.7,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.00804,"percentile":0.5665,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2023-06-29","dueDate":"2023-07-20","ransomware":false,"requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable","notes":"https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=3; https://nvd.nist.gov/vuln/detail/CVE-2021-25372","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-12-22","exploitedFirstSeen":"2020-12-22","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2020-12-22"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2023-06-29"}],"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-787","name":"Out-of-bounds Write"},{"id":"CWE-703","name":"Improper Check or Handling of Exceptional Conditions"}],"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-2021-25372","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Local driver flaw enables privilege escalation","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access","start":0,"end":107}],"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: Out-of-bounds access reads sensitive local data","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows out of bounds memory access","start":73,"end":107}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-12268","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12268","exploited":true,"exploitedSince":"2023-06-29","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1005"],"provenance":"ai"}],"timeline":[{"date":"2020-12-22","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","provenance":"source"},{"date":"2021-03-26","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25372","provenance":"source"},{"date":"2023-06-29","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2023-06-29","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12268","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":825},"priority":{"score":54.0,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 2137 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":11.33,"detail":"percentile 0.5665"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":4.69,"detail":"base score 6.7"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-samsung-mobile-devices-cwe-787"}}