[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fZP88jjRB7n9d-xgyvPVAxYi0S1LRmyLC_9KfMPIFOTw":3,"g5a-risk:CVE-2021-28550":190},{"success":4,"data":5,"meta":188},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":51,"epssPercentile":27,"epssTimeSeries":52,"severity":53,"affectedProducts":54,"affectedProductsCount":40,"references":78,"referencesCount":87,"weaknesses":88,"weaknessesCount":97,"isActivelyExploited":4,"cisaInfo":98,"otxData":27,"relatedBlogPosts":99,"seoMetadata":100,"configurations":125,"relatedVendorCves":172,"notableEvents":173},"CVE-2021-28550","What is CVE-2021-28550?","Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After F...","2021-09-02T17:15:08.5","2025-02-13T17:30:34.487",8.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:R\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":30,"CVSSMetricV2":41,"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":23,"UserInteraction":24,"Scope":25,"ConfidentialityImpact":26,"IntegrityImpact":26,"AvailabilityImpact":26,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":26,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.1","NETWORK","LOW","NONE","REQUIRED","UNCHANGED","HIGH",null,2.8,5.9,[31],{"Source":32,"Type":33,"CVSSData":34,"ExploitabilityScore":28,"ImpactScore":40},"psirt@adobe.com","Secondary",{"Version":35,"VectorString":36,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":24,"Scope":37,"ConfidentialityImpact":26,"IntegrityImpact":26,"AvailabilityImpact":26,"BaseScore":38,"BaseSeverity":39,"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:N\u002FAC:L\u002FPR:N\u002FUI:R\u002FS:C\u002FC:H\u002FI:H\u002FA:H","CHANGED",9.6,"CRITICAL",6,[42],{"Source":17,"Type":18,"CVSSData":43,"BaseSeverity":46,"ExploitabilityScore":49,"ImpactScore":50,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":4},{"Version":44,"VectorString":45,"AccessVector":21,"AccessComplexity":46,"Authentication":23,"ConfidentialityImpact":47,"IntegrityImpact":47,"AvailabilityImpact":47,"BaseScore":48,"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:N\u002FAC:M\u002FAu:N\u002FC:P\u002FI:P\u002FA:P","MEDIUM","PARTIAL",6.8,8.6,6.4,0.51851,[51,51,51,51,51,51,51],"High",[55,60,63,68,71,74],{"vendor":56,"product":57,"version":58,"criteria":59,"vulnerable":4},"adobe","acrobat_dc","*","cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*",{"vendor":56,"product":61,"version":58,"criteria":62,"vulnerable":4},"acrobat_reader_dc","cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*",{"vendor":64,"product":65,"version":66,"criteria":67,"vulnerable":4},"microsoft","windows","-","cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",{"vendor":56,"product":69,"version":58,"criteria":70,"vulnerable":4},"acrobat","cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*",{"vendor":56,"product":72,"version":58,"criteria":73,"vulnerable":4},"acrobat_reader","cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*",{"vendor":75,"product":76,"version":66,"criteria":77,"vulnerable":4},"apple","macos","cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",[79,85],{"url":80,"source":81,"tags":82},"https:\u002F\u002Fhelpx.adobe.com\u002Fsecurity\u002Fproducts\u002Facrobat\u002Fapsb21-29.html","Adobe",[83,84],"Release Notes","Vendor Advisory",{"url":80,"source":81,"tags":86},[83,84],2,[89],{"id":90,"name":91,"description":92,"extendedDescription":93,"status":94,"abstraction":95,"structure":96},"CWE-416","Use After Free","The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","","Stable","Variant","Simple",1,{"shortDescription":93,"requiredAction":93,"vulnerabilityName":93,"dateAdded":27},[],{"title":101,"metaDescription":102,"keywords":103,"canonicalUrl":104,"structuredData":105},"What is CVE-2021-28550? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-28550, a high severity cyber security vulnerability from 2021. High exploit probability (51.9%). Acrobat Reader DC version...","CVE-2021-28550, CVE-2021-28550 vulnerability, CVE-2021-28550 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, adobe security, microsoft security, apple security, acrobat_dc vulnerability, acrobat_reader_dc vulnerability, windows vulnerability, acrobat vulnerability, acrobat_reader vulnerability","\u002Fwhat-is\u002Fcve-2021-28550",{"@context":106,"@type":107,"headline":101,"description":102,"datePublished":10,"dateModified":11,"author":108,"publisher":112,"about":116,"mainEntityOfPage":120,"articleSection":123,"keywords":124},"https:\u002F\u002Fschema.org","TechArticle",{"@type":109,"name":110,"url":111},"Organization","Precursor 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EPSS score decreased by 0.128 on 2023-12-30","EPSS Score Decreased","green",{"id":182,"eventType":183,"eventTime":184,"details":185,"label":186,"color":187},"f93f9489-9763-4463-b724-6bee06dc78af","HIGH_EPSS_DELTA","2025-10-12T04:04:59.17966+00:00","Daily EPSS score increased by 0.153 on 2023-12-30","EPSS Score Increased","red",{"lastModified":11,"cacheTime":189,"version":44},1792356165259,{"score":191,"band":53,"action":192,"scoredAt":193},81,"Emergency patch","2026-10-16T06:51:58.593584+00:00"]