[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$faZax78K7A0oL8dvzVsq_Yr2r-J8KUzs6Jy9rxvxeFOw":3,"g5a-risk:CVE-2021-28651":202},{"success":4,"data":5,"meta":200},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":39,"epssPercentile":26,"epssTimeSeries":40,"severity":41,"affectedProducts":42,"affectedProductsCount":69,"references":70,"referencesCount":111,"weaknesses":112,"weaknessesCount":121,"isActivelyExploited":122,"cisaInfo":26,"otxData":26,"relatedBlogPosts":123,"seoMetadata":124,"configurations":149,"relatedVendorCves":184,"notableEvents":185},"CVE-2021-28651","What is CVE-2021-28651?","An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.","An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request wi...","2021-05-27T12:15:08.197","2023-11-07T03:32:17.65",7.5,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":26,"CVSSMetricV2":29,"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":17,"Type":18,"CVSSData":31,"BaseSeverity":36,"ExploitabilityScore":37,"ImpactScore":38,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},{"Version":32,"VectorString":33,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":34,"BaseScore":35,"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,"MEDIUM",10,2.9,0.0745,[39,39,39,39,39,39,39],"High",[43,48,53,56,61,64],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"squid-cache","squid","*","cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",{"vendor":49,"product":50,"version":51,"criteria":52,"vulnerable":4},"debian","debian_linux","9.0","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",{"vendor":49,"product":50,"version":54,"criteria":55,"vulnerable":4},"10.0","cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",{"vendor":57,"product":58,"version":59,"criteria":60,"vulnerable":4},"fedoraproject","fedora","33","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",{"vendor":57,"product":58,"version":62,"criteria":63,"vulnerable":4},"34","cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",{"vendor":65,"product":66,"version":67,"criteria":68,"vulnerable":4},"netapp","cloud_manager","-","cpe:2.3:a:netapp:cloud_manager:-:*:*:*:*:*:*:*",6,[71,77,81,88,93,97,101,104,108],{"url":72,"source":73,"tags":74},"http:\u002F\u002Fseclists.org\u002Ffulldisclosure\u002F2023\u002FOct\u002F14","Seclists",[75,76],"Mailing List","Third Party Advisory",{"url":78,"source":79,"tags":80},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2023\u002F10\u002F11\u002F3","Openwall",[75,76],{"url":82,"source":83,"tags":84},"https:\u002F\u002Fbugs.squid-cache.org\u002Fshow_bug.cgi?id=5104","Squid-cache",[85,86,87],"Exploit","Issue Tracking","Vendor Advisory",{"url":89,"source":90,"tags":91},"https:\u002F\u002Fgithub.com\u002Fsquid-cache\u002Fsquid\u002Fsecurity\u002Fadvisories\u002FGHSA-ch36-9jhx-phm4","GitHub",[92,76],"Patch",{"url":94,"source":95,"tags":96},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2021\u002F06\u002Fmsg00014.html","Debian",[75,76],{"url":98,"source":99,"tags":100},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FLSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF\u002F","Fedoraproject",[],{"url":102,"source":99,"tags":103},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FT4EPIWUZDJAXADDHVOPKRBTQHPBR6H66\u002F",[],{"url":105,"source":106,"tags":107},"https:\u002F\u002Fsecurity.netapp.com\u002Fadvisory\u002Fntap-20210716-0007\u002F","Netapp",[76],{"url":109,"source":95,"tags":110},"https:\u002F\u002Fwww.debian.org\u002Fsecurity\u002F2021\u002Fdsa-4924",[76],9,[113],{"id":114,"name":115,"description":116,"extendedDescription":117,"status":118,"abstraction":119,"structure":120},"CWE-401","Missing Release of Memory after Effective Lifetime","The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.","This is often triggered by improper handling of malformed data or unexpectedly interrupted sessions.  In some languages, developers are responsible for tracking memory allocation and releasing the memory.  If there are no more pointers or references to the memory, then it can no longer be tracked and identified for release.","Draft","Variant","Simple",1,false,[],{"title":125,"metaDescription":126,"keywords":127,"canonicalUrl":128,"structuredData":129},"What is CVE-2021-28651? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-28651, a high severity cyber security vulnerability from 2021. An issue was discovered in Squid before 4.15 and 5.x before...","CVE-2021-28651, CVE-2021-28651 vulnerability, CVE-2021-28651 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, squid-cache security, debian security, fedoraproject security, netapp security, squid vulnerability, debian_linux vulnerability, fedora vulnerability, cloud_manager vulnerability","\u002Fwhat-is\u002Fcve-2021-28651",{"@context":130,"@type":131,"headline":125,"description":126,"datePublished":10,"dateModified":11,"author":132,"publisher":136,"about":140,"mainEntityOfPage":144,"articleSection":147,"keywords":148},"https:\u002F\u002Fschema.org","TechArticle",{"@type":133,"name":134,"url":135},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":133,"name":134,"url":135,"logo":137},{"@type":138,"url":139},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":141,"name":6,"description":142,"additionalType":143},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":145,"@id":146},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-28651","Cybersecurity","CVE-2021-28651, CVE-2021-28651 vulnerability, CVE-2021-28651 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[150,162,170,178],{"Operator":26,"Negate":26,"Nodes":151},[152],{"Operator":153,"Negate":26,"CPEMatch":154},"OR",[155,158],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":156,"VersionStartExcluding":26,"VersionStartIncluding":32,"VersionEndExcluding":157,"VersionEndIncluding":26},"CB25C152-063D-4C60-8DA0-A0A0256B2310","4.15",{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":159,"VersionStartExcluding":26,"VersionStartIncluding":160,"VersionEndExcluding":161,"VersionEndIncluding":26},"68801A75-0B13-444A-B88F-8BDD4EE953D3","5.0","5.0.6",{"Operator":26,"Negate":26,"Nodes":163},[164],{"Operator":153,"Negate":26,"CPEMatch":165},[166,168],{"Vulnerable":4,"Criteria":52,"MatchCriteriaID":167,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"DEECE5FC-CACF-4496-A3E7-164736409252",{"Vulnerable":4,"Criteria":55,"MatchCriteriaID":169,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",{"Operator":26,"Negate":26,"Nodes":171},[172],{"Operator":153,"Negate":26,"CPEMatch":173},[174,176],{"Vulnerable":4,"Criteria":60,"MatchCriteriaID":175,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"E460AA51-FCDA-46B9-AE97-E6676AA5E194",{"Vulnerable":4,"Criteria":63,"MatchCriteriaID":177,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"A930E247-0B43-43CB-98FF-6CE7B8189835",{"Operator":26,"Negate":26,"Nodes":179},[180],{"Operator":153,"Negate":26,"CPEMatch":181},[182],{"Vulnerable":4,"Criteria":68,"MatchCriteriaID":183,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"197D0D80-6702-4B61-B681-AFDBA7D69067",[],[186,193],{"id":187,"eventType":188,"eventTime":189,"details":190,"label":191,"color":192},"5809c5be-7473-44b3-a58c-b4d358689c04","HIGH_EPSS_DELTA","2025-11-19T04:06:03.178624+00:00","Daily EPSS score increased by 0.482 on 2023-12-30","EPSS Score Increased","red",{"id":194,"eventType":195,"eventTime":196,"details":197,"label":198,"color":199},"5998b44b-befb-438e-931f-1a6d90ed1030","LOW_EPSS_DELTA","2025-11-21T04:05:58.614054+00:00","Daily EPSS score decreased by 0.482 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":201,"version":32},1792347854717,{"score":203,"band":204,"action":205,"scoredAt":206},48,"Medium","Plan remediation","2026-10-16T06:51:13.845816+00:00"]