[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f_YZ1LB6ayzNYX11v77V9kEwH_q3YciWbl85SN15RUe0":3,"g5a-risk:CVE-2021-27710":147},{"success":4,"data":5,"meta":145},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":37,"epssPercentile":27,"epssTimeSeries":38,"severity":39,"affectedProducts":40,"affectedProductsCount":57,"references":58,"referencesCount":68,"weaknesses":69,"weaknessesCount":78,"isActivelyExploited":79,"cisaInfo":27,"otxData":27,"relatedBlogPosts":80,"seoMetadata":81,"configurations":106,"relatedVendorCves":129,"notableEvents":130},"CVE-2021-27710","What is CVE-2021-27710?","Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B20200911 allows remote attackers to execute arbitrary OS commands by sending a modified HTTP request. This occurs because the function executes glibc's system function with untrusted input. In the function, \"ip\" parameter is directly passed to the attacker, allowing them to control the \"ip\" field to attack the OS.","Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B20200911 allows remot...","2021-04-14T18:15:14.377","2021-04-21T15:41:07.21",9.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":27,"CVSSMetricV2":30,"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":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"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","NETWORK","LOW","NONE","UNCHANGED","HIGH","CRITICAL",null,3.9,5.9,[31],{"Source":17,"Type":18,"CVSSData":32,"BaseSeverity":25,"ExploitabilityScore":36,"ImpactScore":36,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":27},{"Version":33,"VectorString":34,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":35,"IntegrityImpact":35,"AvailabilityImpact":35,"BaseScore":36,"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:L\u002FAu:N\u002FC:C\u002FI:C\u002FA:C","COMPLETE",10,0.07905,[37,37,37,37,37,37,37],"Critical",[41,46,50,54],{"vendor":42,"product":43,"version":44,"criteria":45,"vulnerable":4},"totolink","x5000r_firmware","9.1.0u.6118_b20201102","cpe:2.3:o:totolink:x5000r_firmware:9.1.0u.6118_b20201102:*:*:*:*:*:*:*",{"vendor":42,"product":47,"version":48,"criteria":49,"vulnerable":4},"x5000r","-","cpe:2.3:h:totolink:x5000r:-:*:*:*:*:*:*:*",{"vendor":42,"product":51,"version":52,"criteria":53,"vulnerable":4},"a720r_firmware","4.1.5cu.470_b20200911","cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.470_b20200911:*:*:*:*:*:*:*",{"vendor":42,"product":55,"version":48,"criteria":56,"vulnerable":4},"a720r","cpe:2.3:h:totolink:a720r:-:*:*:*:*:*:*:*",4,[59,65],{"url":60,"source":61,"tags":62},"https:\u002F\u002Fhackmd.io\u002FHy3oVgtcQiuqAtv9FdylHw","Hackmd",[63,64],"Exploit","Third Party Advisory",{"url":66,"source":61,"tags":67},"https:\u002F\u002Fhackmd.io\u002FKjXzQdjDRjOuRjoZZXQo_A",[63,64],2,[70],{"id":71,"name":72,"description":73,"extendedDescription":74,"status":75,"abstraction":76,"structure":77},"CWE-78","Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.","This weakness can lead to a vulnerability in environments in which the attacker does not have direct access to the operating system, such as in web applications. Alternately, if the weakness occurs in a privileged program, it could allow the attacker to specify commands that normally would not be accessible, or to call alternate commands with privileges that the attacker does not have. The problem is exacerbated if the compromised process does not follow the principle of least privilege, because the attacker-controlled commands may run with special system privileges that increases the amount of damage.\nThere are at least two subtypes of OS command injection:\nFrom a weakness standpoint, these variants represent distinct programmer errors. In the first variant, the programmer clearly intends that input from untrusted parties will be part of the arguments in the command to be executed. In the second variant, the programmer does not intend for the command to be accessible to any untrusted party, but the programmer probably has not accounted for alternate ways in which malicious attackers can provide input.","Stable","Base","Simple",1,false,[],{"title":82,"metaDescription":83,"keywords":84,"canonicalUrl":85,"structuredData":86},"What is CVE-2021-27710? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-27710, a critical severity cyber security vulnerability from 2021. Command Injection in TOTOLINK X5000R router with firmwa...","CVE-2021-27710, CVE-2021-27710 vulnerability, CVE-2021-27710 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, totolink security, x5000r_firmware vulnerability, x5000r vulnerability, a720r_firmware vulnerability, a720r vulnerability","\u002Fwhat-is\u002Fcve-2021-27710",{"@context":87,"@type":88,"headline":82,"description":83,"datePublished":10,"dateModified":11,"author":89,"publisher":93,"about":97,"mainEntityOfPage":101,"articleSection":104,"keywords":105},"https:\u002F\u002Fschema.org","TechArticle",{"@type":90,"name":91,"url":92},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":90,"name":91,"url":92,"logo":94},{"@type":95,"url":96},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":98,"name":6,"description":99,"additionalType":100},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":102,"@id":103},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-27710","Cybersecurity","CVE-2021-27710, CVE-2021-27710 vulnerability, CVE-2021-27710 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[107,119],{"Operator":108,"Negate":27,"Nodes":109},"AND",[110,115],{"Operator":111,"Negate":27,"CPEMatch":112},"OR",[113],{"Vulnerable":4,"Criteria":45,"MatchCriteriaID":114,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"AFCC3B52-0985-4F61-BBCC-16A271E15CD4",{"Operator":111,"Negate":27,"CPEMatch":116},[117],{"Vulnerable":27,"Criteria":49,"MatchCriteriaID":118,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"BC45BFB0-0CF0-4F9E-B19D-D274B17F1591",{"Operator":108,"Negate":27,"Nodes":120},[121,125],{"Operator":111,"Negate":27,"CPEMatch":122},[123],{"Vulnerable":4,"Criteria":53,"MatchCriteriaID":124,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"C7B3C9D3-E762-4AEE-9E03-B2A1819785A4",{"Operator":111,"Negate":27,"CPEMatch":126},[127],{"Vulnerable":27,"Criteria":56,"MatchCriteriaID":128,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"A1DE5168-B787-462C-B024-2B8F73759034",[],[131,138],{"id":132,"eventType":133,"eventTime":134,"details":135,"label":136,"color":137},"d1ea1c32-51ef-4f59-8eef-23f6419ead78","HIGH_EPSS_DELTA","2025-11-19T04:06:03.863927+00:00","Daily EPSS score increased by 0.107 on 2023-12-30","EPSS Score Increased","red",{"id":139,"eventType":140,"eventTime":141,"details":142,"label":143,"color":144},"43361780-4811-46ce-9ef0-cdee473cc311","LOW_EPSS_DELTA","2025-11-22T04:05:51.400056+00:00","Daily EPSS score decreased by 0.107 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":146,"version":33},1792344927296,{"score":148,"band":149,"action":150,"scoredAt":151},61,"Medium","Plan remediation","2026-10-16T06:50:54.373411+00:00"]