[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fYcl-EVq269-cAiib2P28O2YP9p9sGd3sslNEK0d0JXo":3,"g5a-risk:CVE-2021-26566":181},{"success":4,"data":5,"meta":179},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":47,"epssPercentile":28,"epssTimeSeries":48,"severity":49,"affectedProducts":50,"affectedProductsCount":76,"references":77,"referencesCount":93,"weaknesses":94,"weaknessesCount":109,"isActivelyExploited":110,"cisaInfo":28,"otxData":28,"relatedBlogPosts":111,"seoMetadata":112,"configurations":137,"relatedVendorCves":177,"notableEvents":178},"CVE-2021-26566","What is CVE-2021-26566?","Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.","Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-mi...","2021-02-26T22:15:20.567","2025-01-14T19:29:55.853",9,"CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:N\u002FUI:N\u002FS:C\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":28,"CVSSMetricV2":37,"CVSSMetricV40":28},[16,31],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":29,"ImpactScore":30},"security@synology.com","Secondary",{"Version":20,"VectorString":21,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":25,"Scope":26,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":23,"BaseScore":27,"BaseSeverity":23,"ExploitCodeMaturity":28,"RemediationLevel":28,"ReportConfidence":28,"TemporalScore":28,"TemporalSeverity":28,"ConfidentialityRequirement":28,"IntegrityRequirement":28,"AvailabilityRequirement":23,"ModifiedAttackVector":28,"ModifiedAttackComplexity":28,"ModifiedPrivilegesRequired":28,"ModifiedUserInteraction":28,"ModifiedScope":28,"ModifiedConfidentialityImpact":28,"ModifiedIntegrityImpact":28,"ModifiedAvailabilityImpact":28,"EnvironmentalScore":28,"EnvironmentalSeverity":28},"3.1","CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:N\u002FUI:R\u002FS:C\u002FC:H\u002FI:H\u002FA:H","NETWORK","HIGH","NONE","REQUIRED","CHANGED",8.3,null,1.6,6,{"Source":32,"Type":33,"CVSSData":34,"ExploitabilityScore":36,"ImpactScore":30},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":24,"Scope":26,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":35,"ExploitCodeMaturity":28,"RemediationLevel":28,"ReportConfidence":28,"TemporalScore":28,"TemporalSeverity":28,"ConfidentialityRequirement":28,"IntegrityRequirement":28,"AvailabilityRequirement":23,"ModifiedAttackVector":28,"ModifiedAttackComplexity":28,"ModifiedPrivilegesRequired":28,"ModifiedUserInteraction":28,"ModifiedScope":28,"ModifiedConfidentialityImpact":28,"ModifiedIntegrityImpact":28,"ModifiedAvailabilityImpact":28,"EnvironmentalScore":28,"EnvironmentalSeverity":28},"CRITICAL",2.2,[38],{"Source":32,"Type":33,"CVSSData":39,"BaseSeverity":42,"ExploitabilityScore":45,"ImpactScore":46,"ACInsufInfo":28,"ObtainAllPrivilege":28,"ObtainUserPrivilege":28,"ObtainOtherPrivilege":28,"UserInteractionRequired":28},{"Version":40,"VectorString":41,"AccessVector":22,"AccessComplexity":42,"Authentication":24,"ConfidentialityImpact":43,"IntegrityImpact":43,"AvailabilityImpact":43,"BaseScore":44,"BaseSeverity":28,"Exploitability":28,"RemediationLevel":28,"ReportConfidence":28,"TemporalScore":28,"CollateralDamagePotential":28,"TargetDistribution":28,"ConfidentialityRequirement":28,"IntegrityRequirement":28,"AvailabilityRequirement":28,"EnvironmentalScore":28},"2.0","AV:N\u002FAC:M\u002FAu:N\u002FC:P\u002FI:P\u002FA:P","MEDIUM","PARTIAL",6.8,8.6,6.4,0.01508,[47,47,47,47,47,47,47],"Critical",[51,56,60,63,66,69,73],{"vendor":52,"product":53,"version":54,"criteria":55,"vulnerable":4},"synology","diskstation_manager","*","cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*",{"vendor":52,"product":57,"version":58,"criteria":59,"vulnerable":4},"vs960hd_firmware","-","cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*",{"vendor":52,"product":61,"version":58,"criteria":62,"vulnerable":4},"vs960hd","cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:*",{"vendor":52,"product":64,"version":58,"criteria":65,"vulnerable":4},"skynas_firmware","cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:*",{"vendor":52,"product":67,"version":58,"criteria":68,"vulnerable":4},"skynas","cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:*",{"vendor":52,"product":70,"version":71,"criteria":72,"vulnerable":4},"diskstation_manager_unified_controller","3.0","cpe:2.3:o:synology:diskstation_manager_unified_controller:3.0:*:*:*:*:*:*:*",{"vendor":52,"product":74,"version":58,"criteria":75,"vulnerable":4},"uc3200","cpe:2.3:h:synology:uc3200:-:*:*:*:*:*:*:*",7,[78,83,89,91],{"url":79,"source":80,"tags":81},"https:\u002F\u002Fwww.synology.com\u002Fsecurity\u002Fadvisory\u002FSynology_SA_20_26","Synology",[82],"Vendor Advisory",{"url":84,"source":85,"tags":86},"https:\u002F\u002Fwww.talosintelligence.com\u002Fvulnerability_reports\u002FTALOS-2020-1160","Talosintelligence",[87,88],"Exploit","Third Party Advisory",{"url":79,"source":80,"tags":90},[82],{"url":84,"source":85,"tags":92},[87,88],4,[95,103],{"id":96,"name":97,"description":98,"extendedDescription":99,"status":100,"abstraction":101,"structure":102},"CWE-200","Exposure of Sensitive Information to an Unauthorized Actor","The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.","There are many different kinds of mistakes that introduce information exposures. The severity of the error can range widely, depending on the context in which the product operates, the type of sensitive information that is revealed, and the benefits it may provide to an attacker.  Some kinds of sensitive information include:\nInformation might be sensitive to different parties, each of which may have their own expectations for whether the information should be protected.  These parties include:\nInformation exposures can occur in different ways:\nIt is common practice to describe any loss of confidentiality as an \"information exposure,\" but this can lead to overuse of CWE-200 in CWE mapping. From the CWE perspective, loss of confidentiality is a technical impact that can arise from dozens of different weaknesses, such as insecure file permissions or out-of-bounds read.  CWE-200 and its lower-level descendants are intended to cover the mistakes that occur in behaviors that explicitly manage, store, transfer, or cleanse sensitive information.","Draft","Class","Simple",{"id":104,"name":105,"description":106,"extendedDescription":107,"status":100,"abstraction":108,"structure":102},"CWE-201","Insertion of Sensitive Information Into Sent Data","The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.","Sensitive information could include data that is sensitive in and of itself (such as credentials or private messages), or otherwise useful in the further exploitation of the system (such as internal file system structure).","Base",2,false,[],{"title":113,"metaDescription":114,"keywords":115,"canonicalUrl":116,"structuredData":117},"What is CVE-2021-26566? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-26566, a critical severity cyber security vulnerability from 2021. Insertion of sensitive information into sent data vulne...","CVE-2021-26566, CVE-2021-26566 vulnerability, CVE-2021-26566 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, synology security, diskstation_manager vulnerability, vs960hd_firmware vulnerability, vs960hd vulnerability, skynas_firmware vulnerability, skynas vulnerability","\u002Fwhat-is\u002Fcve-2021-26566",{"@context":118,"@type":119,"headline":113,"description":114,"datePublished":10,"dateModified":11,"author":120,"publisher":124,"about":128,"mainEntityOfPage":132,"articleSection":135,"keywords":136},"https:\u002F\u002Fschema.org","TechArticle",{"@type":121,"name":122,"url":123},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":121,"name":122,"url":123,"logo":125},{"@type":126,"url":127},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":129,"name":6,"description":130,"additionalType":131},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":133,"@id":134},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-26566","Cybersecurity","CVE-2021-26566, CVE-2021-26566 vulnerability, CVE-2021-26566 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[138,146,157,167],{"Operator":28,"Negate":28,"Nodes":139},[140],{"Operator":141,"Negate":28,"CPEMatch":142},"OR",[143],{"Vulnerable":4,"Criteria":55,"MatchCriteriaID":144,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":145,"VersionEndIncluding":28},"1628C07C-CCA7-463C-AA98-BF86C97B0D58","6.2.3-25426-3",{"Operator":147,"Negate":28,"Nodes":148},"AND",[149,153],{"Operator":141,"Negate":28,"CPEMatch":150},[151],{"Vulnerable":4,"Criteria":59,"MatchCriteriaID":152,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"3D0C5120-B961-440F-B454-584BC54B549C",{"Operator":141,"Negate":28,"CPEMatch":154},[155],{"Vulnerable":28,"Criteria":62,"MatchCriteriaID":156,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"1CCBDFF9-AF42-4681-879B-CF789EBAD130",{"Operator":147,"Negate":28,"Nodes":158},[159,163],{"Operator":141,"Negate":28,"CPEMatch":160},[161],{"Vulnerable":4,"Criteria":65,"MatchCriteriaID":162,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"53EF087B-D7E9-4F9A-803A-B0260C495C67",{"Operator":141,"Negate":28,"CPEMatch":164},[165],{"Vulnerable":28,"Criteria":68,"MatchCriteriaID":166,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"D0A88A76-CF8A-4D29-B480-E5317219072D",{"Operator":147,"Negate":28,"Nodes":168},[169,173],{"Operator":141,"Negate":28,"CPEMatch":170},[171],{"Vulnerable":4,"Criteria":72,"MatchCriteriaID":172,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"6B04366E-B5F8-4835-B1FB-106AFD3D3785",{"Operator":141,"Negate":28,"CPEMatch":174},[175],{"Vulnerable":28,"Criteria":75,"MatchCriteriaID":176,"VersionStartExcluding":28,"VersionStartIncluding":28,"VersionEndExcluding":28,"VersionEndIncluding":28},"1100D972-198E-45F9-8F04-763F6FE88377",[],[],{"lastModified":11,"cacheTime":180,"version":40},1792371386179,{"score":182,"band":183,"action":184,"scoredAt":185},56,"Medium","Plan remediation","2026-10-16T06:50:35.04089+00:00"]