[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fGAx2Oe_hN9Bc-AWff9b6lDHQbC5dwmWDdf_lCuUdRDY":3,"g5a-risk:CVE-2023-27992":167},{"success":4,"data":5,"meta":164},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":32,"epssPercentile":27,"epssTimeSeries":33,"severity":34,"affectedProducts":35,"affectedProductsCount":58,"references":59,"referencesCount":73,"weaknesses":74,"weaknessesCount":83,"isActivelyExploited":4,"cisaInfo":84,"otxData":27,"relatedBlogPosts":86,"seoMetadata":87,"configurations":112,"relatedVendorCves":148,"notableEvents":149},"CVE-2023-27992","What is CVE-2023-27992?","The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.","The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5....","2023-06-19T12:15:09.433","2025-10-27T17:05:04.283",9.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":30,"CVSSMetricV2":31,"CVSSMetricV40":27},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":28,"ImpactScore":29},"security@zyxel.com.tw","Secondary",{"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":27,"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,[],[],0.82828,[32,32,32,32,32,32,32],"Critical",[36,41,46,49,52,55],{"vendor":37,"product":38,"version":39,"criteria":40,"vulnerable":4},"zyxel","nas326_firmware","*","cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*",{"vendor":37,"product":42,"version":43,"criteria":44,"vulnerable":45},"nas326","-","cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:*",false,{"vendor":37,"product":47,"version":39,"criteria":48,"vulnerable":4},"nas540_firmware","cpe:2.3:o:zyxel:nas540_firmware:*:*:*:*:*:*:*:*",{"vendor":37,"product":50,"version":43,"criteria":51,"vulnerable":45},"nas540","cpe:2.3:h:zyxel:nas540:-:*:*:*:*:*:*:*",{"vendor":37,"product":53,"version":39,"criteria":54,"vulnerable":4},"nas542_firmware","cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*",{"vendor":37,"product":56,"version":43,"criteria":57,"vulnerable":45},"nas542","cpe:2.3:h:zyxel:nas542:-:*:*:*:*:*:*:*",6,[60,66,68],{"url":61,"source":62,"tags":63},"https:\u002F\u002Fwww.zyxel.com\u002Fglobal\u002Fen\u002Fsupport\u002Fsecurity-advisories\u002Fzyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products","Zyxel",[64,65],"Patch","Vendor Advisory",{"url":61,"source":62,"tags":67},[64,65],{"url":69,"source":70,"tags":71},"https:\u002F\u002Fwww.cisa.gov\u002Fknown-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27992","CISA",[72],"US Government Resource",3,[75],{"id":76,"name":77,"description":78,"extendedDescription":79,"status":80,"abstraction":81,"structure":82},"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,{"shortDescription":85,"requiredAction":85,"vulnerabilityName":85,"dateAdded":27},"",[],{"title":88,"metaDescription":89,"keywords":90,"canonicalUrl":91,"structuredData":92},"What is CVE-2023-27992? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2023-27992, a critical severity cyber security vulnerability from 2023. High exploit probability (82.8%). The pre-authenticatio...","CVE-2023-27992, CVE-2023-27992 vulnerability, CVE-2023-27992 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2023, CVSS score, exploit, patch, remediation, zyxel security, nas326_firmware vulnerability, nas326 vulnerability, nas540_firmware vulnerability, nas540 vulnerability, nas542_firmware vulnerability, high risk vulnerability, actively exploited","\u002Fwhat-is\u002Fcve-2023-27992",{"@context":93,"@type":94,"headline":88,"description":89,"datePublished":10,"dateModified":11,"author":95,"publisher":99,"about":103,"mainEntityOfPage":107,"articleSection":110,"keywords":111},"https:\u002F\u002Fschema.org","TechArticle",{"@type":96,"name":97,"url":98},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":96,"name":97,"url":98,"logo":100},{"@type":101,"url":102},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":104,"name":6,"description":105,"additionalType":106},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":108,"@id":109},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2023-27992","Cybersecurity","CVE-2023-27992, CVE-2023-27992 vulnerability, CVE-2023-27992 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[113,126,137],{"Operator":114,"Negate":27,"Nodes":115},"AND",[116,122],{"Operator":117,"Negate":45,"CPEMatch":118},"OR",[119],{"Vulnerable":4,"Criteria":40,"MatchCriteriaID":120,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":121,"VersionEndIncluding":27},"A4A72863-E165-4A25-B53F-EE5F97236C5A","5.21\\(aazf.14\\)c0",{"Operator":117,"Negate":45,"CPEMatch":123},[124],{"Vulnerable":45,"Criteria":44,"MatchCriteriaID":125,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"E0A01B19-4A91-4FBC-8447-2E854346DAC5",{"Operator":114,"Negate":27,"Nodes":127},[128,133],{"Operator":117,"Negate":45,"CPEMatch":129},[130],{"Vulnerable":4,"Criteria":48,"MatchCriteriaID":131,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":132,"VersionEndIncluding":27},"E86737DF-B02E-484D-AFB8-00D4F3B15330","5.21\\(aatb.11\\)c0",{"Operator":117,"Negate":45,"CPEMatch":134},[135],{"Vulnerable":45,"Criteria":51,"MatchCriteriaID":136,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"B2F7264C-D32A-4EE9-BADC-78518D762BCA",{"Operator":114,"Negate":27,"Nodes":138},[139,144],{"Operator":117,"Negate":45,"CPEMatch":140},[141],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":142,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":143,"VersionEndIncluding":27},"DB6182FF-5301-474F-B324-651208839B0F","5.21\\(abag.11\\)c0",{"Operator":117,"Negate":45,"CPEMatch":145},[146],{"Vulnerable":45,"Criteria":57,"MatchCriteriaID":147,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"31C4DD0F-28D0-4BF7-897B-5EEC32AA7277",[],[150,157],{"id":151,"eventType":152,"eventTime":153,"details":154,"label":155,"color":156},"a35f7952-f427-47b9-900e-2d48829a262e","HIGH_EPSS_DELTA","2025-06-11T10:10:20.236793+00:00","Daily EPSS score increased by 0.235 on 2023-12-30","EPSS Score Increased","red",{"id":158,"eventType":159,"eventTime":160,"details":161,"label":162,"color":163},"a904051e-39b1-47c2-ab2b-866559f45be4","LOW_EPSS_DELTA","2025-11-19T04:05:19.99456+00:00","Daily EPSS score decreased by 0.312 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":165,"version":166},1792356102579,"2.0",{"score":168,"band":34,"action":169,"scoredAt":170},88,"Emergency patch","2026-10-16T06:58:21.742811+00:00"]