{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-10T10:41:37.436","vulnerabilities":[{"cve":{"id":"CVE-2026-21251","sourceIdentifier":"secure@microsoft.com","published":"2026-02-10T18:16:26.840","lastModified":"2026-02-11T19:42:34.007","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Use after free in Windows Cluster Client Failover allows an authorized attacker to elevate privileges locally."},{"lang":"es","value":"Uso después de liberar en la conmutación por error del cliente de clúster de Windows permite a un atacante autorizado elevar privilegios localmente."}],"metrics":{"cvssMetricV31":[{"source":"secure@microsoft.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"weaknesses":[{"source":"secure@microsoft.com","type":"Secondary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*","versionEndExcluding":"10.0.14393.8868","matchCriteriaId":"E21BC97D-1C11-41FD-9A20-34A2BC535BD9"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*","versionEndExcluding":"10.0.17763.8389","matchCriteriaId":"B6E3E93E-8160-4BFB-B5CB-85740922CF7E"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*","versionEndExcluding":"10.0.20348.4711","matchCriteriaId":"9E19FC4B-C3CC-4924-9A0B-5E4F100280D4"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*","versionEndExcluding":"10.0.25398.2149","matchCriteriaId":"F0EA3C51-C3FE-494A-92D9-D3B1C301CB54"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*","versionEndExcluding":"10.0.26100.32313","matchCriteriaId":"33AF95F4-504F-40EF-9F64-5D6F7B40114F"}]}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21251","source":"secure@microsoft.com","tags":["Vendor Advisory"]}]}}]}