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intended access restrictions, and consequently execute arbitrary code, in opportunistic circumstances by leveraging a crafted application, as demonstrated by (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka \".NET Framework JIT Optimization Vulnerability.\""}, {"lang": "es", "value": "El Compilador JIT en Microsoft .NET Framework versiones 3.5 Gold y SP1, 3.5.1 y 4.0, cuando IsJITOptimizerDisabled es falso, no controla apropiadamente las expresiones relacionadas con cadenas NULL, lo que permite a los atacantes dependiendo del contexto omitir las restricciones de acceso previstas, y, en consecuencia, ejecutar c\u00f3digo arbitrario, en circunstancias oportunistas mediante la explotaci\u00f3n a una aplicaci\u00f3n creada, como es demostrado por (1) una aplicaci\u00f3n de navegador XAML creada (tambi\u00e9n conocida como XBAP), (2) una aplicaci\u00f3n ASP.NET creada, o (3) una aplicaci\u00f3n de .NET Framework creada, tambi\u00e9n se conoce como \"NET Framework JIT Optimization Vulnerability\"."}], "id": "CVE-2011-1271", "lastModified": "2026-04-29T01:13:23.040", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 4.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": 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