[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f198_GOcyFcgVtFaMD-iof11-HvTP93PF7FQrX24a0UY":3,"g5a-risk:CVE-2021-31956":226},{"success":4,"data":5,"meta":224},true,{"cveId":6,"title":7,"description":8,"shortDescription":8,"publishedDate":9,"lastModified":10,"cvssScore":11,"cvssVector":12,"cvssMetrics":13,"epssScore":43,"epssPercentile":25,"epssTimeSeries":44,"severity":45,"affectedProducts":46,"affectedProductsCount":108,"references":109,"referencesCount":118,"weaknesses":119,"weaknessesCount":128,"isActivelyExploited":4,"cisaInfo":129,"otxData":25,"relatedBlogPosts":131,"seoMetadata":132,"configurations":157,"relatedVendorCves":208,"notableEvents":209},"CVE-2021-31956","What is CVE-2021-31956?","Windows NTFS Elevation of Privilege Vulnerability","2021-06-08T23:15:08.847","2025-03-07T21:54:07.007",7.8,"CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":14,"CVSSMetricV30":25,"CVSSMetricV2":31,"CVSSMetricV40":25},[15,28],{"Source":16,"Type":17,"CVSSData":18,"ExploitabilityScore":26,"ImpactScore":27},"secure@microsoft.com","Secondary",{"Version":19,"VectorString":12,"AttackVector":20,"AttackComplexity":21,"PrivilegesRequired":21,"UserInteraction":22,"Scope":23,"ConfidentialityImpact":24,"IntegrityImpact":24,"AvailabilityImpact":24,"BaseScore":11,"BaseSeverity":24,"ExploitCodeMaturity":25,"RemediationLevel":25,"ReportConfidence":25,"TemporalScore":25,"TemporalSeverity":25,"ConfidentialityRequirement":25,"IntegrityRequirement":25,"AvailabilityRequirement":24,"ModifiedAttackVector":25,"ModifiedAttackComplexity":25,"ModifiedPrivilegesRequired":25,"ModifiedUserInteraction":25,"ModifiedScope":25,"ModifiedConfidentialityImpact":25,"ModifiedIntegrityImpact":25,"ModifiedAvailabilityImpact":25,"EnvironmentalScore":25,"EnvironmentalSeverity":25},"3.1","LOCAL","LOW","NONE","UNCHANGED","HIGH",null,1.8,5.9,{"Source":29,"Type":17,"CVSSData":30,"ExploitabilityScore":26,"ImpactScore":27},"nvd@nist.gov",{"Version":19,"VectorString":12,"AttackVector":20,"AttackComplexity":21,"PrivilegesRequired":21,"UserInteraction":22,"Scope":23,"ConfidentialityImpact":24,"IntegrityImpact":24,"AvailabilityImpact":24,"BaseScore":11,"BaseSeverity":24,"ExploitCodeMaturity":25,"RemediationLevel":25,"ReportConfidence":25,"TemporalScore":25,"TemporalSeverity":25,"ConfidentialityRequirement":25,"IntegrityRequirement":25,"AvailabilityRequirement":24,"ModifiedAttackVector":25,"ModifiedAttackComplexity":25,"ModifiedPrivilegesRequired":25,"ModifiedUserInteraction":25,"ModifiedScope":25,"ModifiedConfidentialityImpact":25,"ModifiedIntegrityImpact":25,"ModifiedAvailabilityImpact":25,"EnvironmentalScore":25,"EnvironmentalSeverity":25},[32],{"Source":29,"Type":33,"CVSSData":34,"BaseSeverity":24,"ExploitabilityScore":41,"ImpactScore":42,"ACInsufInfo":25,"ObtainAllPrivilege":25,"ObtainUserPrivilege":25,"ObtainOtherPrivilege":25,"UserInteractionRequired":4},"Primary",{"Version":35,"VectorString":36,"AccessVector":37,"AccessComplexity":38,"Authentication":22,"ConfidentialityImpact":39,"IntegrityImpact":39,"AvailabilityImpact":39,"BaseScore":40,"BaseSeverity":25,"Exploitability":25,"RemediationLevel":25,"ReportConfidence":25,"TemporalScore":25,"CollateralDamagePotential":25,"TargetDistribution":25,"ConfidentialityRequirement":25,"IntegrityRequirement":25,"AvailabilityRequirement":25,"EnvironmentalScore":25},"2.0","AV:N\u002FAC:M\u002FAu:N\u002FC:C\u002FI:C\u002FA:C","NETWORK","MEDIUM","COMPLETE",9.3,8.6,10,0.22273,[43,43,43,43,43,43,43],"High",[47,52,56,59,62,65,68,71,74,78,81,84,87,91,94,97,99,102,105],{"vendor":48,"product":49,"version":50,"criteria":51,"vulnerable":4},"microsoft","windows_10","1809","cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*",{"vendor":48,"product":53,"version":54,"criteria":55,"vulnerable":4},"windows_10_1507","*","cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*",{"vendor":48,"product":57,"version":54,"criteria":58,"vulnerable":4},"windows_10_1607","cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*",{"vendor":48,"product":60,"version":54,"criteria":61,"vulnerable":4},"windows_10_1809","cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*",{"vendor":48,"product":63,"version":54,"criteria":64,"vulnerable":4},"windows_10_1909","cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*",{"vendor":48,"product":66,"version":54,"criteria":67,"vulnerable":4},"windows_10_2004","cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*",{"vendor":48,"product":69,"version":54,"criteria":70,"vulnerable":4},"windows_10_20h2","cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*",{"vendor":48,"product":72,"version":54,"criteria":73,"vulnerable":4},"windows_10_21h1","cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*",{"vendor":48,"product":75,"version":76,"criteria":77,"vulnerable":4},"windows_7","-","cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*",{"vendor":48,"product":79,"version":76,"criteria":80,"vulnerable":4},"windows_8.1","cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*",{"vendor":48,"product":82,"version":76,"criteria":83,"vulnerable":4},"windows_rt_8.1","cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*",{"vendor":48,"product":85,"version":54,"criteria":86,"vulnerable":4},"windows_server_2004","cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*",{"vendor":48,"product":88,"version":89,"criteria":90,"vulnerable":4},"windows_server_2008","r2","cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*",{"vendor":48,"product":88,"version":92,"criteria":93,"vulnerable":4},"sp2","cpe:2.3:o:microsoft:windows_server_2008:sp2:*:*:*:*:*:*:*",{"vendor":48,"product":95,"version":76,"criteria":96,"vulnerable":4},"windows_server_2012","cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*",{"vendor":48,"product":95,"version":89,"criteria":98,"vulnerable":4},"cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*",{"vendor":48,"product":100,"version":54,"criteria":101,"vulnerable":4},"windows_server_2016","cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",{"vendor":48,"product":103,"version":54,"criteria":104,"vulnerable":4},"windows_server_2019","cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",{"vendor":48,"product":106,"version":54,"criteria":107,"vulnerable":4},"windows_server_20h2","cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*",19,[110,116],{"url":111,"source":112,"tags":113},"https:\u002F\u002Fportal.msrc.microsoft.com\u002Fen-US\u002Fsecurity-guidance\u002Fadvisory\u002FCVE-2021-31956","Microsoft",[114,115],"Patch","Vendor Advisory",{"url":111,"source":112,"tags":117},[114,115],2,[120],{"id":121,"name":122,"description":123,"extendedDescription":124,"status":125,"abstraction":126,"structure":127},"CWE-191","Integer Underflow (Wrap or Wraparound)","The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.","This can happen in signed and unsigned cases.","Draft","Base","Simple",1,{"shortDescription":130,"requiredAction":130,"vulnerabilityName":130,"dateAdded":25},"",[],{"title":133,"metaDescription":134,"keywords":135,"canonicalUrl":136,"structuredData":137},"What is CVE-2021-31956? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-31956, a high severity cyber security vulnerability from 2021. Windows NTFS Elevation of Privilege Vulnerability Get CVSS ...","CVE-2021-31956, CVE-2021-31956 vulnerability, CVE-2021-31956 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, microsoft security, windows_10 vulnerability, windows_10_1507 vulnerability, windows_10_1607 vulnerability, windows_10_1809 vulnerability, windows_10_1909 vulnerability","\u002Fwhat-is\u002Fcve-2021-31956",{"@context":138,"@type":139,"headline":133,"description":134,"datePublished":9,"dateModified":10,"author":140,"publisher":144,"about":148,"mainEntityOfPage":152,"articleSection":155,"keywords":156},"https:\u002F\u002Fschema.org","TechArticle",{"@type":141,"name":142,"url":143},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":141,"name":142,"url":143,"logo":145},{"@type":146,"url":147},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":149,"name":6,"description":150,"additionalType":151},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":153,"@id":154},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-31956","Cybersecurity","CVE-2021-31956, CVE-2021-31956 vulnerability, CVE-2021-31956 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[158],{"Operator":25,"Negate":25,"Nodes":159},[160],{"Operator":161,"Negate":25,"CPEMatch":162},"OR",[163,165,168,171,174,177,180,183,186,188,190,192,194,196,198,200,202,204,206],{"Vulnerable":4,"Criteria":51,"MatchCriteriaID":164,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"6B8F3DD2-A145-4AF1-8545-CC42892DA3D1",{"Vulnerable":4,"Criteria":55,"MatchCriteriaID":166,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":167,"VersionEndIncluding":25},"C6D804CC-3D0A-442D-AD15-77779C9168F5","10.0.10240.18967",{"Vulnerable":4,"Criteria":58,"MatchCriteriaID":169,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":170,"VersionEndIncluding":25},"3330A6EC-E638-4760-91F1-BB920ACDBB17","10.0.14393.4467",{"Vulnerable":4,"Criteria":61,"MatchCriteriaID":172,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":173,"VersionEndIncluding":25},"0DF9B75A-049E-44AA-B4DD-3384F3ED5E52","10.0.17763.1999",{"Vulnerable":4,"Criteria":64,"MatchCriteriaID":175,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":176,"VersionEndIncluding":25},"25BDC753-1696-4A75-AC79-E482662BD743","10.0.18363.1621",{"Vulnerable":4,"Criteria":67,"MatchCriteriaID":178,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":179,"VersionEndIncluding":25},"4110DDEF-AFEB-469C-8FF1-9208D5AD254A","10.0.19041.1052",{"Vulnerable":4,"Criteria":70,"MatchCriteriaID":181,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":182,"VersionEndIncluding":25},"A81D1961-6D36-4BBB-96C2-15D5480637CE","10.0.19042.1052",{"Vulnerable":4,"Criteria":73,"MatchCriteriaID":184,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":185,"VersionEndIncluding":25},"579557C6-7D3C-4D9D-B8DF-E3193C01715C","10.0.19043.1052",{"Vulnerable":4,"Criteria":77,"MatchCriteriaID":187,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"C2B1C231-DE19-4B8F-A4AA-5B3A65276E46",{"Vulnerable":4,"Criteria":80,"MatchCriteriaID":189,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"E93068DB-549B-45AB-8E5C-00EB5D8B5CF8",{"Vulnerable":4,"Criteria":83,"MatchCriteriaID":191,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"C6CE5198-C498-4672-AF4C-77AB4BE06C5C",{"Vulnerable":4,"Criteria":86,"MatchCriteriaID":193,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":179,"VersionEndIncluding":25},"854BE587-9888-4365-ABBA-AC951DC7BCB4",{"Vulnerable":4,"Criteria":90,"MatchCriteriaID":195,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F",{"Vulnerable":4,"Criteria":93,"MatchCriteriaID":197,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"66CAFDB7-9D41-4E67-AB83-5EB104551FF5",{"Vulnerable":4,"Criteria":96,"MatchCriteriaID":199,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"A7DF96F8-BA6A-4780-9CA3-F719B3F81074",{"Vulnerable":4,"Criteria":98,"MatchCriteriaID":201,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"DB18C4CE-5917-401E-ACF7-2747084FD36E",{"Vulnerable":4,"Criteria":101,"MatchCriteriaID":203,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":170,"VersionEndIncluding":25},"6EC20279-4DB0-4D87-93EF-235D0D36B1D3",{"Vulnerable":4,"Criteria":104,"MatchCriteriaID":205,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":173,"VersionEndIncluding":25},"ACDF4D88-D052-40A6-96A7-865C33112B4F",{"Vulnerable":4,"Criteria":107,"MatchCriteriaID":207,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":182,"VersionEndIncluding":25},"B963E9AB-D1F7-45D1-8B7E-675732475401",[],[210,217],{"id":211,"eventType":212,"eventTime":213,"details":214,"label":215,"color":216},"3239af7c-0a6b-41c4-8a3b-acd051e388b2","LOW_EPSS_DELTA","2025-11-19T04:06:00.77077+00:00","Daily EPSS score decreased by 0.250 on 2023-12-30","EPSS Score Decreased","green",{"id":218,"eventType":219,"eventTime":220,"details":221,"label":222,"color":223},"47d1d509-6ca2-4a5d-9654-e73002a42785","HIGH_EPSS_DELTA","2025-11-22T04:05:48.726296+00:00","Daily EPSS score increased by 0.234 on 2023-12-30","EPSS Score Increased","red",{"lastModified":10,"cacheTime":225,"version":35},1792252772792,{"score":227,"band":45,"action":228,"scoredAt":229},72,"Emergency patch","2026-10-16T06:51:17.469204+00:00"]