[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fDdES-kjzcTgldS1ToHvi88II_oWe-z3tx9i0PRzNSBk":3,"g5a-risk:CVE-2021-27878":137},{"success":4,"data":5,"meta":135},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":46,"epssPercentile":26,"epssTimeSeries":47,"severity":48,"affectedProducts":49,"affectedProductsCount":55,"references":56,"referencesCount":78,"weaknesses":79,"weaknessesCount":55,"isActivelyExploited":4,"cisaInfo":83,"otxData":26,"relatedBlogPosts":84,"seoMetadata":85,"configurations":110,"relatedVendorCves":119,"notableEvents":120},"CVE-2021-27878","What is CVE-2021-27878?","An issue was discovered in Veritas Backup Exec before 21.2. The communication between a client and an Agent requires successful authentication, which is typically completed over a secure TLS communication. However, due to a vulnerability in the SHA Authentication scheme, an attacker is able to gain unauthorized access and complete the authentication process. Subsequently, the client can execute data management protocol commands on the authenticated connection. The attacker could use one of these commands to execute an arbitrary command on the system using system privileges.","An issue was discovered in Veritas Backup Exec before 21.2. The communication between a client and an Agent requires successful authentication, which is typi...","2021-03-01T22:15:14.537","2025-11-03T15:16:31.977",8.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":33,"CVSSMetricV2":34,"CVSSMetricV40":26},[16,29],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"cve@mitre.org","Secondary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","NETWORK","LOW","NONE","UNCHANGED","HIGH",null,2.8,5.9,{"Source":30,"Type":31,"CVSSData":32,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},[],[35],{"Source":30,"Type":31,"CVSSData":36,"BaseSeverity":25,"ExploitabilityScore":43,"ImpactScore":44,"ACInsufInfo":45,"ObtainAllPrivilege":45,"ObtainUserPrivilege":45,"ObtainOtherPrivilege":45,"UserInteractionRequired":45},{"Version":37,"VectorString":38,"AccessVector":21,"AccessComplexity":22,"Authentication":39,"ConfidentialityImpact":40,"IntegrityImpact":40,"AvailabilityImpact":40,"BaseScore":41,"BaseSeverity":42,"Exploitability":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"CollateralDamagePotential":26,"TargetDistribution":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"EnvironmentalScore":26},"2.0","AV:N\u002FAC:L\u002FAu:S\u002FC:C\u002FI:C\u002FA:C","SINGLE","COMPLETE",9,"",8,10,false,0.23952,[46,46,46,46,46,46,46],"High",[50],{"vendor":51,"product":52,"version":53,"criteria":54,"vulnerable":4},"veritas","backup_exec","*","cpe:2.3:a:veritas:backup_exec:*:*:*:*:*:*:*:*",1,[57,64,69,71,73],{"url":58,"source":59,"tags":60},"http:\u002F\u002Fpacketstormsecurity.com\u002Ffiles\u002F168506\u002FVeritas-Backup-Exec-Agent-Remote-Code-Execution.html","Packetstormsecurity",[61,62,63],"Exploit","Third Party Advisory","VDB Entry",{"url":65,"source":66,"tags":67},"https:\u002F\u002Fwww.veritas.com\u002Fcontent\u002Fsupport\u002Fen_US\u002Fsecurity\u002FVTS21-001#issue3","Veritas",[68],"Vendor Advisory",{"url":58,"source":59,"tags":70},[61,62,63],{"url":65,"source":66,"tags":72},[68],{"url":74,"source":75,"tags":76},"https:\u002F\u002Fwww.cisa.gov\u002Fknown-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27878","CISA",[77],"US Government Resource",5,[80],{"id":81,"name":81,"description":82},"Unknown","NVD-CWE-noinfo",{"shortDescription":42,"requiredAction":42,"vulnerabilityName":42,"dateAdded":26},[],{"title":86,"metaDescription":87,"keywords":88,"canonicalUrl":89,"structuredData":90},"What is CVE-2021-27878? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-27878, a high severity cyber security vulnerability from 2021. An issue was discovered in Veritas Backup Exec before 21.2....","CVE-2021-27878, CVE-2021-27878 vulnerability, CVE-2021-27878 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, veritas security, backup_exec vulnerability","\u002Fwhat-is\u002Fcve-2021-27878",{"@context":91,"@type":92,"headline":86,"description":87,"datePublished":10,"dateModified":11,"author":93,"publisher":97,"about":101,"mainEntityOfPage":105,"articleSection":108,"keywords":109},"https:\u002F\u002Fschema.org","TechArticle",{"@type":94,"name":95,"url":96},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":94,"name":95,"url":96,"logo":98},{"@type":99,"url":100},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":102,"name":6,"description":103,"additionalType":104},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":106,"@id":107},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-27878","Cybersecurity","CVE-2021-27878, CVE-2021-27878 vulnerability, CVE-2021-27878 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[111],{"Operator":26,"Negate":26,"Nodes":112},[113],{"Operator":114,"Negate":45,"CPEMatch":115},"OR",[116],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":117,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":118,"VersionEndIncluding":26},"2E6F2EEE-7E5A-4EA1-87F2-97C26EAE8FCC","21.2",[],[121,128],{"id":122,"eventType":123,"eventTime":124,"details":125,"label":126,"color":127},"29e5af98-4fc0-47a7-b8a0-8df2ce6057bd","HIGH_EPSS_DELTA","2025-11-19T04:06:03.790828+00:00","Daily EPSS score increased by 0.384 on 2023-12-30","EPSS Score Increased","red",{"id":129,"eventType":130,"eventTime":131,"details":132,"label":133,"color":134},"5080bcb3-ca3f-496a-858b-beaf47bef1b9","LOW_EPSS_DELTA","2025-11-22T04:05:51.330675+00:00","Daily EPSS score decreased by 0.384 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":136,"version":37},1792348121652,{"score":138,"band":48,"action":139,"scoredAt":140},75,"Emergency patch","2026-10-16T06:50:35.052077+00:00"]