{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21111", "assignerOrgId": "3af57064-a867-422c-b2ad-40307b65c458", "state": "PUBLISHED", "assignerShortName": "SamsungMobile", "dateReserved": "2025-12-11T01:33:35.830Z", "datePublished": "2026-09-09T04:48:01.536Z", "dateUpdated": "2026-09-09T04:48:01.536Z"}, "containers": {"cna": {"problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-787: Out-of-bounds Write"}]}], "affected": [{"vendor": "Samsung Mobile", "product": "libsthmbc", "versions": [{"status": "unaffected", "version": "One UI 8.5", "versionType": "semver", "lessThan": "*"}], "defaultStatus": "affected"}], "descriptions": [{"lang": "en", "value": "Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory."}], "references": [{"url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=09"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "vectorString": "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", "baseSeverity": "MEDIUM"}}], "providerMetadata": {"orgId": "3af57064-a867-422c-b2ad-40307b65c458", "shortName": "SamsungMobile", "dateUpdated": "2026-09-09T04:48:01.536Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "affected", "product": "libsthmbc", "vendor": "Samsung Mobile", "versions": [{"lessThan": "*", "status": "unaffected", "version": "One UI 8.5", "versionType": "semver"}]}], "source": "mobile.security@samsung.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory."}], "id": "CVE-2026-21111", "lastModified": "2026-09-09T05:17:23.640", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "mobile.security@samsung.com", "type": "Secondary"}]}, "published": "2026-09-09T05:17:23.640", "references": [{"source": "mobile.security@samsung.com", "url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=09"}], "sourceIdentifier": "mobile.security@samsung.com", "vulnStatus": "Received"}

{}

{"created": "2026-09-09T11:00:08.640153+00:00", "title": "Out-of-Bounds Write in Samsung libsthmbc Allows Local Memory Corruption", "updated": "2026-09-09T11:00:08.640159+00:00", "vendors": [], "weaknesses": ["CWE-119", "CWE-787"]}