[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3f4-3F5TMvGDfD_jHKLfuCvTPkdQew2CrSfqdKZ0GU0":3,"g5a-risk:CVE-2021-31955":166},{"success":4,"data":5,"meta":164},true,{"cveId":6,"title":7,"description":8,"shortDescription":8,"publishedDate":9,"lastModified":10,"cvssScore":11,"cvssVector":12,"cvssMetrics":13,"epssScore":42,"epssPercentile":26,"epssTimeSeries":43,"severity":44,"affectedProducts":45,"affectedProductsCount":72,"references":73,"referencesCount":82,"weaknesses":83,"weaknessesCount":92,"isActivelyExploited":4,"cisaInfo":93,"otxData":26,"relatedBlogPosts":95,"seoMetadata":96,"configurations":121,"relatedVendorCves":148,"notableEvents":149},"CVE-2021-31955","What is CVE-2021-31955?","Windows Kernel Information Disclosure Vulnerability","2021-06-08T23:15:08.817","2025-03-07T21:54:07.007",5.5,"CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:N\u002FA:N",{"CVSSMetricV31":14,"CVSSMetricV30":26,"CVSSMetricV2":32,"CVSSMetricV40":26},[15,29],{"Source":16,"Type":17,"CVSSData":18,"ExploitabilityScore":27,"ImpactScore":28},"secure@microsoft.com","Secondary",{"Version":19,"VectorString":12,"AttackVector":20,"AttackComplexity":21,"PrivilegesRequired":21,"UserInteraction":22,"Scope":23,"ConfidentialityImpact":24,"IntegrityImpact":22,"AvailabilityImpact":22,"BaseScore":11,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":22,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","LOCAL","LOW","NONE","UNCHANGED","HIGH","MEDIUM",null,1.8,3.6,{"Source":30,"Type":17,"CVSSData":31,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov",{"Version":19,"VectorString":12,"AttackVector":20,"AttackComplexity":21,"PrivilegesRequired":21,"UserInteraction":22,"Scope":23,"ConfidentialityImpact":24,"IntegrityImpact":22,"AvailabilityImpact":22,"BaseScore":11,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":22,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},[33],{"Source":30,"Type":34,"CVSSData":35,"BaseSeverity":21,"ExploitabilityScore":40,"ImpactScore":41,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},"Primary",{"Version":36,"VectorString":37,"AccessVector":20,"AccessComplexity":21,"Authentication":22,"ConfidentialityImpact":38,"IntegrityImpact":22,"AvailabilityImpact":22,"BaseScore":39,"BaseSeverity":26,"Exploitability":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"CollateralDamagePotential":26,"TargetDistribution":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"EnvironmentalScore":26},"2.0","AV:L\u002FAC:L\u002FAu:N\u002FC:P\u002FI:N\u002FA:N","PARTIAL",2.1,3.9,2.9,0.81107,[42,42,42,42,42,42,42],"Medium",[46,51,54,57,60,63,66,69],{"vendor":47,"product":48,"version":49,"criteria":50,"vulnerable":4},"microsoft","windows_10_1809","*","cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*",{"vendor":47,"product":52,"version":49,"criteria":53,"vulnerable":4},"windows_10_1909","cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*",{"vendor":47,"product":55,"version":49,"criteria":56,"vulnerable":4},"windows_10_2004","cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*",{"vendor":47,"product":58,"version":49,"criteria":59,"vulnerable":4},"windows_10_20h2","cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*",{"vendor":47,"product":61,"version":49,"criteria":62,"vulnerable":4},"windows_10_21h1","cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*",{"vendor":47,"product":64,"version":49,"criteria":65,"vulnerable":4},"windows_server_2004","cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*",{"vendor":47,"product":67,"version":49,"criteria":68,"vulnerable":4},"windows_server_2019","cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",{"vendor":47,"product":70,"version":49,"criteria":71,"vulnerable":4},"windows_server_20h2","cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*",8,[74,80],{"url":75,"source":76,"tags":77},"https:\u002F\u002Fportal.msrc.microsoft.com\u002Fen-US\u002Fsecurity-guidance\u002Fadvisory\u002FCVE-2021-31955","Microsoft",[78,79],"Patch","Vendor Advisory",{"url":75,"source":76,"tags":81},[78,79],2,[84],{"id":85,"name":86,"description":87,"extendedDescription":88,"status":89,"abstraction":90,"structure":91},"CWE-497","Exposure of Sensitive System Information to an Unauthorized Control Sphere","The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.","Network-based products, such as web applications, often run on top of an operating system or similar environment.  When the product communicates with outside parties, details about the underlying system are expected to remain hidden, such as path names for data files, other OS users, installed packages, the application environment, etc. This system information may be provided by the product itself, or buried within diagnostic or debugging messages. Debugging information helps an adversary learn about the system and form an attack plan.\nAn information exposure occurs when system data or debugging information leaves the program through an output stream or logging function that makes it accessible to unauthorized parties. Using other weaknesses, an attacker could cause errors to occur; the response to these errors can reveal detailed system information, along with other impacts.  An attacker can use messages that reveal technologies, operating systems, and product versions to tune the attack against known vulnerabilities in these technologies. A product may use diagnostic methods that provide significant implementation details such as stack traces as part of its error handling mechanism.","Incomplete","Base","Simple",1,{"shortDescription":94,"requiredAction":94,"vulnerabilityName":94,"dateAdded":26},"",[],{"title":97,"metaDescription":98,"keywords":99,"canonicalUrl":100,"structuredData":101},"What is CVE-2021-31955? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-31955, a medium severity cyber security vulnerability from 2021. High exploit probability (81.1%). Windows Kernel Informat...","CVE-2021-31955, CVE-2021-31955 vulnerability, CVE-2021-31955 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, microsoft security, windows_10_1809 vulnerability, windows_10_1909 vulnerability, windows_10_2004 vulnerability, windows_10_20h2 vulnerability, windows_10_21h1 vulnerability, high risk vulnerability, actively exploited","\u002Fwhat-is\u002Fcve-2021-31955",{"@context":102,"@type":103,"headline":97,"description":98,"datePublished":9,"dateModified":10,"author":104,"publisher":108,"about":112,"mainEntityOfPage":116,"articleSection":119,"keywords":120},"https:\u002F\u002Fschema.org","TechArticle",{"@type":105,"name":106,"url":107},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":105,"name":106,"url":107,"logo":109},{"@type":110,"url":111},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":113,"name":6,"description":114,"additionalType":115},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":117,"@id":118},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-31955","Cybersecurity","CVE-2021-31955, CVE-2021-31955 vulnerability, CVE-2021-31955 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[122],{"Operator":26,"Negate":26,"Nodes":123},[124],{"Operator":125,"Negate":26,"CPEMatch":126},"OR",[127,130,133,136,139,142,144,146],{"Vulnerable":4,"Criteria":50,"MatchCriteriaID":128,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":129,"VersionEndIncluding":26},"0DF9B75A-049E-44AA-B4DD-3384F3ED5E52","10.0.17763.1999",{"Vulnerable":4,"Criteria":53,"MatchCriteriaID":131,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":132,"VersionEndIncluding":26},"25BDC753-1696-4A75-AC79-E482662BD743","10.0.18363.1621",{"Vulnerable":4,"Criteria":56,"MatchCriteriaID":134,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":135,"VersionEndIncluding":26},"4110DDEF-AFEB-469C-8FF1-9208D5AD254A","10.0.19041.1052",{"Vulnerable":4,"Criteria":59,"MatchCriteriaID":137,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":138,"VersionEndIncluding":26},"A81D1961-6D36-4BBB-96C2-15D5480637CE","10.0.19042.1052",{"Vulnerable":4,"Criteria":62,"MatchCriteriaID":140,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":141,"VersionEndIncluding":26},"579557C6-7D3C-4D9D-B8DF-E3193C01715C","10.0.19043.1052",{"Vulnerable":4,"Criteria":65,"MatchCriteriaID":143,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":135,"VersionEndIncluding":26},"854BE587-9888-4365-ABBA-AC951DC7BCB4",{"Vulnerable":4,"Criteria":68,"MatchCriteriaID":145,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":129,"VersionEndIncluding":26},"ACDF4D88-D052-40A6-96A7-865C33112B4F",{"Vulnerable":4,"Criteria":71,"MatchCriteriaID":147,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":138,"VersionEndIncluding":26},"B963E9AB-D1F7-45D1-8B7E-675732475401",[],[150,157],{"id":151,"eventType":152,"eventTime":153,"details":154,"label":155,"color":156},"eaf92cca-12ed-43ea-a48d-d545b41ba175","HIGH_EPSS_DELTA","2025-11-19T04:06:00.77077+00:00","Daily EPSS score increased by 0.376 on 2023-12-30","EPSS Score Increased","red",{"id":158,"eventType":159,"eventTime":160,"details":161,"label":162,"color":163},"362609e1-accd-47fc-8fc2-f465397cf464","LOW_EPSS_DELTA","2025-11-22T04:05:48.726296+00:00","Daily EPSS score decreased by 0.376 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":10,"cacheTime":165,"version":36},1792252773275,{"score":167,"band":168,"action":169,"scoredAt":170},74,"High","Emergency patch","2026-10-16T06:51:17.468891+00:00"]