{"id":"CVE-2026-21111","title":"Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory.","summary":"Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory.","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N","cwe":["CWE-787"],"vendor":"Samsung Mobile","product":"libsthmbc","affected":["libsthmbc (all versions)"],"published":"2026-09-09","updated":"2026-09-10","sourceUpdated":"2026-09-10T15:17:29.100","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21111","references":[{"url":"https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=09","label":"mobile.security@samsung.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T14:10:19.110568Z"},"cvssSource":"cna","ingestedAt":"2026-09-10T19:29:00.034Z","epss":0.00099,"epssPercentile":0.00917,"slug":"CVE-2026-21111","body":"## Overview\n\nOut-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":38,"depthScoreParts":{"impact":38,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}