{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T22:49:23.471","vulnerabilities":[{"cve":{"id":"CVE-2026-21243","sourceIdentifier":"secure@microsoft.com","published":"2026-02-10T18:16:25.480","lastModified":"2026-02-11T20:41:23.863","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network."},{"lang":"es","value":"Desreferencia de puntero nulo en LDAP de Windows - Protocolo ligero de acceso a directorios permite a un atacante no autorizado denegar el servicio a través de una red."}],"metrics":{"cvssMetricV31":[{"source":"secure@microsoft.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"weaknesses":[{"source":"secure@microsoft.com","type":"Secondary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"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-2026-21243","source":"secure@microsoft.com","tags":["Vendor Advisory"]}]}}]}