[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fVp16tlFXRDONxK63SEOKg7XXrGJoBOqd90P3zsM4gAw":3,"g5a-risk:CVE-2009-2521":135},{"success":4,"data":5,"meta":133},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":34,"epssPercentile":28,"epssTimeSeries":35,"severity":36,"affectedProducts":37,"affectedProductsCount":43,"references":44,"referencesCount":30,"weaknesses":79,"weaknessesCount":43,"isActivelyExploited":32,"cisaInfo":28,"otxData":28,"relatedBlogPosts":88,"seoMetadata":89,"configurations":114,"relatedVendorCves":124,"notableEvents":125},"CVE-2009-2521","What is CVE-2009-2521?","Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka \"IIS FTP Service DoS Vulnerability.\"","Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to caus...","2009-09-04T10:30:01.907","2026-06-16T23:09:37.8",5,"AV:N\u002FAC:L\u002FAu:N\u002FC:N\u002FI:N\u002FA:P",{"CVSSMetricV31":15,"CVSSMetricV30":16,"CVSSMetricV2":17,"CVSSMetricV40":33},[],[],[18],{"Source":19,"Type":20,"CVSSData":21,"BaseSeverity":29,"ExploitabilityScore":30,"ImpactScore":31,"ACInsufInfo":32,"ObtainAllPrivilege":32,"ObtainUserPrivilege":32,"ObtainOtherPrivilege":32,"UserInteractionRequired":32},"nvd@nist.gov","Primary",{"Version":22,"VectorString":13,"AccessVector":23,"AccessComplexity":24,"Authentication":25,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":26,"BaseScore":12,"BaseSeverity":27,"Exploitability":28,"RemediationLevel":28,"ReportConfidence":28,"TemporalScore":28,"CollateralDamagePotential":28,"TargetDistribution":28,"ConfidentialityRequirement":28,"IntegrityRequirement":28,"AvailabilityRequirement":28,"EnvironmentalScore":28},"2.0","NETWORK","LOW","NONE","PARTIAL","",null,"MEDIUM",10,2.9,false,[],0.82265,[34,34,34,34,34,34,34],"Medium",[38],{"vendor":39,"product":40,"version":41,"criteria":42,"vulnerable":4},"microsoft","internet_information_services","*","cpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*",1,[45,50,54,60,65,69,71,73,75,77],{"url":46,"source":47,"tags":48},"http:\u002F\u002Farchives.neohapsis.com\u002Farchives\u002Ffulldisclosure\u002F2009-09\u002F0040.html","Neohapsis",[49],"Broken Link",{"url":51,"source":52,"tags":53},"http:\u002F\u002Fsupport.microsoft.com\u002Fdefault.aspx?scid=kb%3B%5BLN%5D%3BQ975191","Microsoft",[],{"url":55,"source":56,"tags":57},"http:\u002F\u002Fwww.us-cert.gov\u002Fcas\u002Ftechalerts\u002FTA09-286A.html","Us-cert",[58,59],"Third Party Advisory","US Government Resource",{"url":61,"source":52,"tags":62},"https:\u002F\u002Fdocs.microsoft.com\u002Fen-us\u002Fsecurity-updates\u002Fsecuritybulletins\u002F2009\u002Fms09-053",[63,64],"Patch","Vendor Advisory",{"url":66,"source":67,"tags":68},"https:\u002F\u002Foval.cisecurity.org\u002Frepository\u002Fsearch\u002Fdefinition\u002Foval%3Aorg.mitre.oval%3Adef%3A6508","Cisecurity",[58],{"url":46,"source":47,"tags":70},[49],{"url":51,"source":52,"tags":72},[],{"url":55,"source":56,"tags":74},[58,59],{"url":61,"source":52,"tags":76},[63,64],{"url":66,"source":67,"tags":78},[58],[80],{"id":81,"name":82,"description":83,"extendedDescription":84,"status":85,"abstraction":86,"structure":87},"CWE-400","Uncontrolled Resource Consumption","The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.","Limited resources include memory, file system storage, database connection pool entries, and CPU. If an attacker can trigger the allocation of these limited resources, but the number or size of the resources is not controlled, then the attacker could cause a denial of service that consumes all available resources. This would prevent valid users from accessing the product, and it could potentially have an impact on the surrounding environment. For example, a memory exhaustion attack against an application could slow down the application as well as its host operating system.\nThere are at least three distinct scenarios which can commonly lead to resource exhaustion:\nResource exhaustion problems are often result due to an incorrect implementation of the following situations:","Draft","Class","Simple",[],{"title":90,"metaDescription":91,"keywords":92,"canonicalUrl":93,"structuredData":94},"What is CVE-2009-2521? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2009-2521, a medium severity cyber security vulnerability from 2009. High exploit probability (82.3%). Stack consumption vulner...","CVE-2009-2521, CVE-2009-2521 vulnerability, CVE-2009-2521 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2009, CVSS score, exploit, patch, remediation, microsoft security, internet_information_services vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2009-2521",{"@context":95,"@type":96,"headline":90,"description":91,"datePublished":10,"dateModified":11,"author":97,"publisher":101,"about":105,"mainEntityOfPage":109,"articleSection":112,"keywords":113},"https:\u002F\u002Fschema.org","TechArticle",{"@type":98,"name":99,"url":100},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":98,"name":99,"url":100,"logo":102},{"@type":103,"url":104},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":106,"name":6,"description":107,"additionalType":108},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":110,"@id":111},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2009-2521","Cybersecurity","CVE-2009-2521, CVE-2009-2521 vulnerability, CVE-2009-2521 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[115],{"Operator":28,"Negate":28,"Nodes":116},[117],{"Operator":118,"Negate":32,"CPEMatch":119},"OR",[120],{"Vulnerable":4,"Criteria":42,"MatchCriteriaID":121,"VersionStartExcluding":28,"VersionStartIncluding":122,"VersionEndExcluding":28,"VersionEndIncluding":123},"4ED209E9-04E3-4FDD-947E-8103273FF41D","5.0","7.0",[],[126],{"id":127,"eventType":128,"eventTime":129,"details":130,"label":131,"color":132},"b3ba9b48-4494-41e7-8ab1-1d17984c2387","HIGH_EPSS_DELTA","2026-06-16T04:07:00.720402+00:00","Daily EPSS score increased by 0.215 on 2023-12-30","EPSS Score Increased","red",{"lastModified":11,"cacheTime":134,"version":22},1792264670839,{"score":136,"band":36,"action":137,"scoredAt":138},53,"Plan remediation","2026-10-17T06:36:51.686021+00:00"]