{"id":"CVE-2026-21124","title":"Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.","summary":"Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.","severity":"high","cwe":["CWE-20"],"published":"2026-10-12","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:13:37.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21124","references":[{"url":"https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10","label":"mobile.security@samsung.com"}],"tags":["nvd","cve.org"],"epss":0.00121,"epssPercentile":0.01921,"ingestedAt":"2026-10-12T14:50:34.086Z","vendor":"Samsung Mobile","product":"Samsung Mobile Devices","affected":["devices (all versions)"],"cvss":8.6,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-12T00:00:00+00:00"},"cvssSource":"cna","slug":"CVE-2026-21124","body":"## Overview\n\nImproper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220810,"id":"CVE-2026-21124","ts":1792026822698,"field":"cvss","old":null,"new":"8.6"},{"seq":220809,"id":"CVE-2026-21124","ts":1792026822698,"field":"severity","old":"none","new":"high"}]}