[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fumDX9KlPeGBpjyeYXS1rk2FmBOclEFz0PdICbPwirmg":3,"g5a-risk:CVE-2020-8867":125},{"success":4,"data":5,"meta":123},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":48,"epssPercentile":26,"epssTimeSeries":49,"severity":50,"affectedProducts":51,"affectedProductsCount":57,"references":58,"referencesCount":70,"weaknesses":71,"weaknessesCount":70,"isActivelyExploited":85,"cisaInfo":26,"otxData":26,"relatedBlogPosts":86,"seoMetadata":87,"configurations":112,"relatedVendorCves":121,"notableEvents":122},"CVE-2020-8867","What is CVE-2020-8867?","This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.","This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. ...","2020-04-22T21:15:14.09","2020-04-29T14:45:40",7.5,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":29,"CVSSMetricV2":39,"CVSSMetricV40":26},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":25,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","NETWORK","LOW","NONE","UNCHANGED","HIGH",null,3.9,3.6,[30],{"Source":31,"Type":32,"CVSSData":33,"ExploitabilityScore":27,"ImpactScore":38},"zdi-disclosures@trendmicro.com","Secondary",{"Version":34,"VectorString":35,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":22,"BaseScore":36,"BaseSeverity":37,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.0","CVSS:3.0\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:L",5.3,"MEDIUM",1.4,[40],{"Source":17,"Type":18,"CVSSData":41,"BaseSeverity":37,"ExploitabilityScore":46,"ImpactScore":47,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},{"Version":42,"VectorString":43,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":44,"BaseScore":45,"BaseSeverity":26,"Exploitability":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"CollateralDamagePotential":26,"TargetDistribution":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"EnvironmentalScore":26},"2.0","AV:N\u002FAC:L\u002FAu:N\u002FC:N\u002FI:N\u002FA:P","PARTIAL",5,10,2.9,0.02644,[48,48,48,48,48,48,48],"High",[52],{"vendor":53,"product":54,"version":55,"criteria":56,"vulnerable":4},"opcfoundation","unified_architecture_.net-standard","*","cpe:2.3:a:opcfoundation:unified_architecture_.net-standard:*:*:*:*:*:*:*:*",1,[59,64],{"url":60,"source":61,"tags":62},"https:\u002F\u002Fopcfoundation.org\u002FSecurityBulletins\u002FOPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf","Opcfoundation",[63],"Vendor Advisory",{"url":65,"source":66,"tags":67},"https:\u002F\u002Fwww.zerodayinitiative.com\u002Fadvisories\u002FZDI-20-536\u002F","Zerodayinitiative",[68,69],"Third Party Advisory","VDB Entry",2,[72,80],{"id":73,"name":74,"description":75,"extendedDescription":76,"status":77,"abstraction":78,"structure":79},"CWE-367","Time-of-check Time-of-use (TOCTOU) Race Condition","The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.","This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.","Incomplete","Base","Simple",{"id":81,"name":82,"description":83,"extendedDescription":84,"status":77,"abstraction":78,"structure":79},"CWE-613","Insufficient Session Expiration","According to WASC, \"Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.\"","",false,[],{"title":88,"metaDescription":89,"keywords":90,"canonicalUrl":91,"structuredData":92},"What is CVE-2020-8867? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2020-8867, a high severity cyber security vulnerability from 2020. This vulnerability allows remote attackers to create a denia...","CVE-2020-8867, CVE-2020-8867 vulnerability, CVE-2020-8867 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2020, CVSS score, exploit, patch, remediation, opcfoundation security, unified_architecture_.net-standard vulnerability","\u002Fwhat-is\u002Fcve-2020-8867",{"@context":93,"@type":94,"headline":88,"description":89,"datePublished":10,"dateModified":11,"author":95,"publisher":99,"about":103,"mainEntityOfPage":107,"articleSection":110,"keywords":111},"https:\u002F\u002Fschema.org","TechArticle",{"@type":96,"name":97,"url":98},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":96,"name":97,"url":98,"logo":100},{"@type":101,"url":102},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":104,"name":6,"description":105,"additionalType":106},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":108,"@id":109},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2020-8867","Cybersecurity","CVE-2020-8867, CVE-2020-8867 vulnerability, CVE-2020-8867 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[113],{"Operator":26,"Negate":26,"Nodes":114},[115],{"Operator":116,"Negate":26,"CPEMatch":117},"OR",[118],{"Vulnerable":4,"Criteria":56,"MatchCriteriaID":119,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":120},"777516A6-5857-48CF-B36C-EFA0E8935EF5","1.04.358.30",[],[],{"lastModified":11,"cacheTime":124,"version":42},1792366598825,{"score":126,"band":127,"action":128,"scoredAt":129},46,"Medium","Plan remediation","2026-10-16T06:48:28.682071+00:00"]