[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fN3zxGZlPA5N6K2jjNH4YoAj-6TMLFyodjK-qi0YNb8E":3,"g5a-risk:CVE-2021-27241":111},{"success":4,"data":5,"meta":109},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":46,"epssPercentile":27,"epssTimeSeries":47,"severity":48,"affectedProducts":49,"affectedProductsCount":55,"references":56,"referencesCount":55,"weaknesses":63,"weaknessesCount":55,"isActivelyExploited":72,"cisaInfo":27,"otxData":27,"relatedBlogPosts":73,"seoMetadata":74,"configurations":99,"relatedVendorCves":107,"notableEvents":108},"CVE-2021-27241","What is CVE-2021-27241?","This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561)...","2021-03-29T21:15:12.593","2021-04-01T16:04:36.25",6.1,"CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:L\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":30,"CVSSMetricV2":37,"CVSSMetricV40":27},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":28,"ImpactScore":29},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":22,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":25,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.1","LOCAL","LOW","NONE","UNCHANGED","HIGH","MEDIUM",null,1.8,4.2,[31],{"Source":32,"Type":33,"CVSSData":34,"ExploitabilityScore":28,"ImpactScore":29},"zdi-disclosures@trendmicro.com","Secondary",{"Version":35,"VectorString":36,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":22,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.0","CVSS:3.0\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:L\u002FA:H",[38],{"Source":17,"Type":18,"CVSSData":39,"BaseSeverity":22,"ExploitabilityScore":44,"ImpactScore":45,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":27},{"Version":40,"VectorString":41,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":42,"AvailabilityImpact":42,"BaseScore":43,"BaseSeverity":27,"Exploitability":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"CollateralDamagePotential":27,"TargetDistribution":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"EnvironmentalScore":27},"2.0","AV:L\u002FAC:L\u002FAu:N\u002FC:N\u002FI:P\u002FA:P","PARTIAL",3.6,3.9,4.9,0.00261,[46,46,46,46,46,46,46],"Medium",[50],{"vendor":51,"product":52,"version":53,"criteria":54,"vulnerable":4},"avast","premium_security","20.8.2429","cpe:2.3:a:avast:premium_security:20.8.2429:*:*:*:*:*:*:*",1,[57],{"url":58,"source":59,"tags":60},"https:\u002F\u002Fwww.zerodayinitiative.com\u002Fadvisories\u002FZDI-21-208\u002F","Zerodayinitiative",[61,62],"Third Party Advisory","VDB Entry",[64],{"id":65,"name":66,"description":67,"extendedDescription":68,"status":69,"abstraction":70,"structure":71},"CWE-59","Improper Link Resolution Before File Access ('Link Following')","The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.","","Draft","Base","Simple",false,[],{"title":75,"metaDescription":76,"keywords":77,"canonicalUrl":78,"structuredData":79},"What is CVE-2021-27241? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-27241, a medium severity cyber security vulnerability from 2021. This vulnerability allows local attackers to delete arbit...","CVE-2021-27241, CVE-2021-27241 vulnerability, CVE-2021-27241 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, avast security, premium_security vulnerability","\u002Fwhat-is\u002Fcve-2021-27241",{"@context":80,"@type":81,"headline":75,"description":76,"datePublished":10,"dateModified":11,"author":82,"publisher":86,"about":90,"mainEntityOfPage":94,"articleSection":97,"keywords":98},"https:\u002F\u002Fschema.org","TechArticle",{"@type":83,"name":84,"url":85},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":83,"name":84,"url":85,"logo":87},{"@type":88,"url":89},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":91,"name":6,"description":92,"additionalType":93},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":95,"@id":96},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-27241","Cybersecurity","CVE-2021-27241, CVE-2021-27241 vulnerability, CVE-2021-27241 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[100],{"Operator":27,"Negate":27,"Nodes":101},[102],{"Operator":103,"Negate":27,"CPEMatch":104},"OR",[105],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":106,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"2686D810-4654-4FF3-A785-A2B43139967E",[],[],{"lastModified":11,"cacheTime":110,"version":40},1792372962678,{"score":112,"band":113,"action":114,"scoredAt":115},18,"Info","Track","2026-10-16T06:50:47.142098+00:00"]