{"id":"CVE-2021-25369","published":"2021-03-26T19:15:12Z","modified":"2026-06-17T03:41:57Z","title":"Samsung Mobile Devices Improper Access Control Vulnerability","vendor":"Samsung","product":"Mobile Devices","tier":"core","eol":null,"description":{"text":"An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel information to userspace.","provenance":"source","from":"NVD"},"summary":{"text":"An improper access control flaw in the sec_log file of Samsung Mobile Devices exposes sensitive kernel information to userspace. An attacker with local access and low-privileged credentials on the device, requiring no user interaction, can read that kernel information.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:14:56Z"},"cvss":{"score":5.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.01079,"percentile":0.65074,"date":"2026-10-31","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-2021-25369","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-12-10","exploitedFirstSeen":"2020-12-10","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2020-12-10"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-11-08"},{"url":"https://www.f5.com/labs/articles/threat-intelligence/sensor-intel-series-top-cves-august-2024","date":"2024-09-19"},{"url":"https://www.f5.com/labs/articles/threat-intelligence/botpoke-scanner-switches-ip","date":"2024-11-25"},{"url":"https://www.f5.com/labs/articles/threat-intelligence/continued-scanning-for-cve-2023-1389","date":"2025-01-21"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":null,"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"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-2021-25369","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 privilege-level access control bypass","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"improper access control vulnerability in sec_log file","start":3,"end":56}],"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: reads kernel data from local filesystem","mappingType":"primary_impact","evidence":[{"from":"description","quote":"exposes sensitive kernel information to userspace","start":89,"end":138}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-12265","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12265","exploited":true,"exploitedSince":"2022-11-08","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1005"],"provenance":"ai"}],"timeline":[{"date":"2020-12-10","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-2021-25369","provenance":"source"},{"date":"2022-11-08","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-11-08","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12265","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":592},"priority":{"score":51.9,"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 2152 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":13.01,"detail":"percentile 0.6507"},{"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":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":3.85,"detail":"base score 5.5"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}