[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ffBr5gunPAnjr3xeeEIVON-XBreyuTpjg-GqJtCPhjyk":3,"g5a-risk:CVE-2018-4121":198},{"success":4,"data":5,"meta":196},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":40,"epssPercentile":15,"epssTimeSeries":41,"severity":42,"affectedProducts":43,"affectedProductsCount":69,"references":70,"referencesCount":110,"weaknesses":111,"weaknessesCount":120,"isActivelyExploited":121,"cisaInfo":15,"otxData":15,"relatedBlogPosts":122,"seoMetadata":123,"configurations":148,"relatedVendorCves":187,"notableEvents":188},"CVE-2018-4121","What is CVE-2018-4121?","An issue was discovered in certain Apple products. iOS before 11.3 is affected. Safari before 11.1 is affected. iCloud before 7.4 on Windows is affected. iTunes before 12.7.4 on Windows is affected. tvOS before 11.3 is affected. watchOS before 4.3 is affected. The issue involves the \"WebKit\" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.","An issue was discovered in certain Apple products. iOS before 11.3 is affected. Safari before 11.1 is affected. iCloud before 7.4 on Windows is affected. iTu...","2018-04-03T06:29:05.25","2019-03-08T16:06:35.92",8.8,"CVSS:3.0\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:R\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":16,"CVSSMetricV2":30,"CVSSMetricV40":15},null,[17],{"Source":18,"Type":19,"CVSSData":20,"ExploitabilityScore":28,"ImpactScore":29},"nvd@nist.gov","Primary",{"Version":21,"VectorString":13,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":25,"Scope":26,"ConfidentialityImpact":27,"IntegrityImpact":27,"AvailabilityImpact":27,"BaseScore":12,"BaseSeverity":27,"ExploitCodeMaturity":15,"RemediationLevel":15,"ReportConfidence":15,"TemporalScore":15,"TemporalSeverity":15,"ConfidentialityRequirement":15,"IntegrityRequirement":15,"AvailabilityRequirement":15,"ModifiedAttackVector":15,"ModifiedAttackComplexity":15,"ModifiedPrivilegesRequired":15,"ModifiedUserInteraction":15,"ModifiedScope":15,"ModifiedConfidentialityImpact":15,"ModifiedIntegrityImpact":15,"ModifiedAvailabilityImpact":15,"EnvironmentalScore":15,"EnvironmentalSeverity":15},"3.0","NETWORK","LOW","NONE","REQUIRED","UNCHANGED","HIGH",2.8,5.9,[31],{"Source":18,"Type":19,"CVSSData":32,"BaseSeverity":35,"ExploitabilityScore":38,"ImpactScore":39,"ACInsufInfo":15,"ObtainAllPrivilege":15,"ObtainUserPrivilege":15,"ObtainOtherPrivilege":15,"UserInteractionRequired":4},{"Version":33,"VectorString":34,"AccessVector":22,"AccessComplexity":35,"Authentication":24,"ConfidentialityImpact":36,"IntegrityImpact":36,"AvailabilityImpact":36,"BaseScore":37,"BaseSeverity":15,"Exploitability":15,"RemediationLevel":15,"ReportConfidence":15,"TemporalScore":15,"CollateralDamagePotential":15,"TargetDistribution":15,"ConfidentialityRequirement":15,"IntegrityRequirement":15,"AvailabilityRequirement":15,"EnvironmentalScore":15},"2.0","AV:N\u002FAC:M\u002FAu:N\u002FC:P\u002FI:P\u002FA:P","MEDIUM","PARTIAL",6.8,8.6,6.4,0.13099,[40,40,40,40,40,40,40],"High",[44,49,52,55,58,61,66],{"vendor":45,"product":46,"version":47,"criteria":48,"vulnerable":4},"apple","safari","*","cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*",{"vendor":45,"product":50,"version":47,"criteria":51,"vulnerable":4},"iphone_os","cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",{"vendor":45,"product":53,"version":47,"criteria":54,"vulnerable":4},"tvos","cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*",{"vendor":45,"product":56,"version":47,"criteria":57,"vulnerable":4},"watchos","cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",{"vendor":45,"product":59,"version":47,"criteria":60,"vulnerable":4},"icloud","cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*",{"vendor":62,"product":63,"version":64,"criteria":65,"vulnerable":4},"microsoft","windows","-","cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",{"vendor":45,"product":67,"version":47,"criteria":68,"vulnerable":4},"itunes","cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*",7,[71,77,82,86,91,94,97,100,103,106],{"url":72,"source":73,"tags":74},"http:\u002F\u002Fwww.securitytracker.com\u002Fid\u002F1040604","Securitytracker",[75,76],"Third Party Advisory","VDB Entry",{"url":78,"source":79,"tags":80},"https:\u002F\u002Fgithub.com\u002Fmwrlabs\u002FCVE-2018-4121","GitHub",[81,75],"Exploit",{"url":83,"source":84,"tags":85},"https:\u002F\u002Fsecurity.gentoo.org\u002Fglsa\u002F201808-04","Gentoo",[75],{"url":87,"source":88,"tags":89},"https:\u002F\u002Fsupport.apple.com\u002FHT208693","Apple",[90],"Vendor Advisory",{"url":92,"source":88,"tags":93},"https:\u002F\u002Fsupport.apple.com\u002FHT208694",[90],{"url":95,"source":88,"tags":96},"https:\u002F\u002Fsupport.apple.com\u002FHT208695",[90],{"url":98,"source":88,"tags":99},"https:\u002F\u002Fsupport.apple.com\u002FHT208696",[90],{"url":101,"source":88,"tags":102},"https:\u002F\u002Fsupport.apple.com\u002FHT208697",[90],{"url":104,"source":88,"tags":105},"https:\u002F\u002Fsupport.apple.com\u002FHT208698",[90],{"url":107,"source":108,"tags":109},"https:\u002F\u002Fwww.exploit-db.com\u002Fexploits\u002F44427\u002F","Exploit-db",[81,75,76],10,[112],{"id":113,"name":114,"description":115,"extendedDescription":116,"status":117,"abstraction":118,"structure":119},"CWE-119","Improper Restriction of Operations within the Bounds of a Memory Buffer","The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.","Certain languages allow direct addressing of memory locations and do not automatically ensure that these locations are valid for the memory buffer that is being referenced. This can cause read or write operations to be performed on memory locations that may be associated with other variables, data structures, or internal program data.","Stable","Class","Simple",1,false,[],{"title":124,"metaDescription":125,"keywords":126,"canonicalUrl":127,"structuredData":128},"What is CVE-2018-4121? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2018-4121, a high severity cyber security vulnerability from 2018. An issue was discovered in certain Apple products. iOS befor...","CVE-2018-4121, CVE-2018-4121 vulnerability, CVE-2018-4121 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2018, CVSS score, exploit, patch, remediation, apple security, microsoft security, safari vulnerability, iphone_os vulnerability, tvos vulnerability, watchos vulnerability, icloud vulnerability","\u002Fwhat-is\u002Fcve-2018-4121",{"@context":129,"@type":130,"headline":124,"description":125,"datePublished":10,"dateModified":11,"author":131,"publisher":135,"about":139,"mainEntityOfPage":143,"articleSection":146,"keywords":147},"https:\u002F\u002Fschema.org","TechArticle",{"@type":132,"name":133,"url":134},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":132,"name":133,"url":134,"logo":136},{"@type":137,"url":138},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":140,"name":6,"description":141,"additionalType":142},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":144,"@id":145},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2018-4121","Cybersecurity","CVE-2018-4121, CVE-2018-4121 vulnerability, CVE-2018-4121 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[149,165,177],{"Operator":15,"Negate":15,"Nodes":150},[151],{"Operator":152,"Negate":15,"CPEMatch":153},"OR",[154,157,160,162],{"Vulnerable":4,"Criteria":48,"MatchCriteriaID":155,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":156,"VersionEndIncluding":15},"2683E773-F7E6-4B5A-B341-F34EC83368BB","11.1",{"Vulnerable":4,"Criteria":51,"MatchCriteriaID":158,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":159,"VersionEndIncluding":15},"1AE9DC77-7A0A-47A4-9B85-6CCCFDE5B313","11.3",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":161,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":159,"VersionEndIncluding":15},"2027A893-A9F8-4594-89B3-FEAFD69AB877",{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":163,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":164,"VersionEndIncluding":15},"360435F9-FC38-422B-8888-3656AF59A3BF","4.3",{"Operator":166,"Negate":15,"Nodes":167},"AND",[168,173],{"Operator":152,"Negate":15,"CPEMatch":169},[170],{"Vulnerable":4,"Criteria":60,"MatchCriteriaID":171,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":172,"VersionEndIncluding":15},"C0720731-C892-498A-BFFE-D3DBCD096973","7.4",{"Operator":152,"Negate":15,"CPEMatch":174},[175],{"Vulnerable":15,"Criteria":65,"MatchCriteriaID":176,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":15,"VersionEndIncluding":15},"A2572D17-1DE6-457B-99CC-64AFD54487EA",{"Operator":166,"Negate":15,"Nodes":178},[179,184],{"Operator":152,"Negate":15,"CPEMatch":180},[181],{"Vulnerable":4,"Criteria":68,"MatchCriteriaID":182,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":183,"VersionEndIncluding":15},"C7F515A1-9B93-4D6F-A269-CAEDEC1DD85E","12.7.4",{"Operator":152,"Negate":15,"CPEMatch":185},[186],{"Vulnerable":15,"Criteria":65,"MatchCriteriaID":176,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":15,"VersionEndIncluding":15},[],[189],{"id":190,"eventType":191,"eventTime":192,"details":193,"label":194,"color":195},"16f83b30-de43-497a-805b-ee441bb9f300","LOW_EPSS_DELTA","2026-06-16T04:06:11.602592+00:00","Daily EPSS score decreased by 0.254 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":197,"version":33},1792252943948,{"score":199,"band":200,"action":201,"scoredAt":202},53,"Medium","Plan remediation","2026-10-16T06:43:44.240755+00:00"]