[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fsq0c063VtE5zNwG8uGe4ZqGrfahuihX3Y1Hs9QfpZIM":3,"g5a-risk:CVE-2021-34753":119},{"success":4,"data":5,"meta":116},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":39,"epssPercentile":28,"epssTimeSeries":40,"severity":41,"affectedProducts":42,"affectedProductsCount":51,"references":52,"referencesCount":58,"weaknesses":59,"weaknessesCount":58,"isActivelyExploited":68,"cisaInfo":28,"otxData":28,"relatedBlogPosts":69,"seoMetadata":70,"configurations":95,"relatedVendorCves":114,"notableEvents":115},"CVE-2021-34753","What is CVE-2021-34753?","A vulnerability in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic.\r\n\r\nThis vulnerability is due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit this vulnerability by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should trigger and drop for the ENIP packet.","A vulnerability in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an un...","2024-11-15T17:15:10.303","2026-08-11T19:40:47.23",5.3,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:L\u002FA:N",{"CVSSMetricV31":15,"CVSSMetricV30":36,"CVSSMetricV2":37,"CVSSMetricV40":38},[16,31],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":29,"ImpactScore":30},"psirt@cisco.com","Secondary",{"Version":20,"VectorString":21,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":24,"Scope":25,"ConfidentialityImpact":24,"IntegrityImpact":23,"AvailabilityImpact":24,"BaseScore":26,"BaseSeverity":27,"ExploitCodeMaturity":28,"RemediationLevel":28,"ReportConfidence":28,"TemporalScore":28,"TemporalSeverity":28,"ConfidentialityRequirement":28,"IntegrityRequirement":28,"AvailabilityRequirement":28,"ModifiedAttackVector":28,"ModifiedAttackComplexity":28,"ModifiedPrivilegesRequired":28,"ModifiedUserInteraction":28,"ModifiedScope":28,"ModifiedConfidentialityImpact":28,"ModifiedIntegrityImpact":28,"ModifiedAvailabilityImpact":28,"EnvironmentalScore":28,"EnvironmentalSeverity":28},"3.1","CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:L\u002FA:N","NETWORK","LOW","NONE","CHANGED",5.8,"MEDIUM",null,3.9,1.4,{"Source":32,"Type":33,"CVSSData":34,"ExploitabilityScore":29,"ImpactScore":30},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":24,"Scope":35,"ConfidentialityImpact":24,"IntegrityImpact":23,"AvailabilityImpact":24,"BaseScore":12,"BaseSeverity":27,"ExploitCodeMaturity":28,"RemediationLevel":28,"ReportConfidence":28,"TemporalScore":28,"TemporalSeverity":28,"ConfidentialityRequirement":28,"IntegrityRequirement":28,"AvailabilityRequirement":28,"ModifiedAttackVector":28,"ModifiedAttackComplexity":28,"ModifiedPrivilegesRequired":28,"ModifiedUserInteraction":28,"ModifiedScope":28,"ModifiedConfidentialityImpact":28,"ModifiedIntegrityImpact":28,"ModifiedAvailabilityImpact":28,"EnvironmentalScore":28,"EnvironmentalSeverity":28},"UNCHANGED",[],[],[],0.00663,[39,39,39,39,39,39,39],"Medium",[43,48],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"cisco","secure_firewall_threat_defense","*","cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*",{"vendor":44,"product":45,"version":49,"criteria":50,"vulnerable":4},"7.0.0","cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0:*:*:*:*:*:*:*",2,[53],{"url":54,"source":55,"tags":56},"https:\u002F\u002Fsec.cloudapps.cisco.com\u002Fsecurity\u002Fcenter\u002Fcontent\u002FCiscoSecurityAdvisory\u002Fcisco-sa-ftd-enip-bypass-eFsxd8KP","Cisco",[57],"Vendor Advisory",1,[60],{"id":61,"name":62,"description":63,"extendedDescription":64,"status":65,"abstraction":66,"structure":67},"CWE-284","Improper Access Control","The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.","Access control involves the use of several protection mechanisms such as:\nWhen any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc.\nThere are two distinct behaviors that can introduce access control weaknesses:","Incomplete","Pillar","Simple",false,[],{"title":71,"metaDescription":72,"keywords":73,"canonicalUrl":74,"structuredData":75},"What is CVE-2021-34753? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-34753, a medium severity cyber security vulnerability from 2024. A vulnerability in the payload inspection for Ethernet In...","CVE-2021-34753, CVE-2021-34753 vulnerability, CVE-2021-34753 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2024, CVSS score, exploit, patch, remediation, cisco security, secure_firewall_threat_defense vulnerability","\u002Fwhat-is\u002Fcve-2021-34753",{"@context":76,"@type":77,"headline":71,"description":72,"datePublished":10,"dateModified":11,"author":78,"publisher":82,"about":86,"mainEntityOfPage":90,"articleSection":93,"keywords":94},"https:\u002F\u002Fschema.org","TechArticle",{"@type":79,"name":80,"url":81},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":79,"name":80,"url":81,"logo":83},{"@type":84,"url":85},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":87,"name":6,"description":88,"additionalType":89},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":91,"@id":92},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-34753","Cybersecurity","CVE-2021-34753, CVE-2021-34753 vulnerability, CVE-2021-34753 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[96],{"Operator":28,"Negate":28,"Nodes":97},[98],{"Operator":99,"Negate":68,"CPEMatch":100},"OR",[101,104,108,112],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":102,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":103,"VersionEndIncluding":28},"D5F57AA9-B4B0-4BF7-A32D-B5628929BC23","6.4.0.13",{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":105,"VersionStartExcluding":28,"VersionStartIncluding":106,"VersionEndExcluding":107,"VersionEndIncluding":28},"F66814B3-C041-407D-98AD-70B4384BAA4C","6.5.0","6.6.5.1",{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":109,"VersionStartExcluding":28,"VersionStartIncluding":110,"VersionEndExcluding":111,"VersionEndIncluding":28},"AEC6CF5C-9A31-41B0-99EA-FB2734E4CFDD","6.7.0","6.7.0.3",{"Vulnerable":4,"Criteria":50,"MatchCriteriaID":113,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"604568DA-466A-47C0-8229-C7F1A10FCDE9",[],[],{"lastModified":11,"cacheTime":117,"version":118},1792364893725,"2.0",{"score":120,"band":121,"action":122,"scoredAt":123},23,"Low","Monitor","2026-10-16T07:04:34.131386+00:00"]