[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$flPGdqbk6aL_AfYFfMXbF1ZCVI-VHdJDQud0NHhF8gR4":3,"g5a-risk:CVE-2021-40524":139},{"success":4,"data":5,"meta":137},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":42,"epssPercentile":26,"epssTimeSeries":43,"severity":44,"affectedProducts":45,"affectedProductsCount":51,"references":52,"referencesCount":76,"weaknesses":77,"weaknessesCount":51,"isActivelyExploited":41,"cisaInfo":26,"otxData":26,"relatedBlogPosts":85,"seoMetadata":86,"configurations":111,"relatedVendorCves":121,"notableEvents":122},"CVE-2021-40524","What is CVE-2021-40524?","In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. 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Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-40524, a high severity cyber security vulnerability from 2021. In Pure-FTPd before 1.0.50, an incorrect max_filesize quota...","CVE-2021-40524, CVE-2021-40524 vulnerability, CVE-2021-40524 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, pureftpd security, pure-ftpd vulnerability","\u002Fwhat-is\u002Fcve-2021-40524",{"@context":92,"@type":93,"headline":87,"description":88,"datePublished":10,"dateModified":11,"author":94,"publisher":98,"about":102,"mainEntityOfPage":106,"articleSection":109,"keywords":110},"https:\u002F\u002Fschema.org","TechArticle",{"@type":95,"name":96,"url":97},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":95,"name":96,"url":97,"logo":99},{"@type":100,"url":101},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":103,"name":6,"description":104,"additionalType":105},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":107,"@id":108},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-40524","Cybersecurity","CVE-2021-40524, CVE-2021-40524 vulnerability, CVE-2021-40524 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[112],{"Operator":26,"Negate":26,"Nodes":113},[114],{"Operator":115,"Negate":41,"CPEMatch":116},"OR",[117],{"Vulnerable":4,"Criteria":50,"MatchCriteriaID":118,"VersionStartExcluding":26,"VersionStartIncluding":119,"VersionEndExcluding":120,"VersionEndIncluding":26},"1BB7E569-40DC-47B8-AD6A-4F3EF8C0D092","1.0.23","1.0.50",[],[123,130],{"id":124,"eventType":125,"eventTime":126,"details":127,"label":128,"color":129},"cd199dbe-7500-4277-9d7d-173f34f639f6","HIGH_EPSS_DELTA","2025-10-09T04:06:00.324566+00:00","Daily EPSS score increased by 0.230 on 2023-12-30","EPSS Score Increased","red",{"id":131,"eventType":132,"eventTime":133,"details":134,"label":135,"color":136},"fe1a551c-17e4-4770-b83f-02b5d2090104","LOW_EPSS_DELTA","2025-11-22T04:05:43.575893+00:00","Daily EPSS score decreased by 0.237 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":138,"version":33},1792264671250,{"score":140,"band":141,"action":142,"scoredAt":143},48,"Medium","Plan remediation","2026-10-16T06:51:58.610525+00:00"]