{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-17T22:23:15.460","vulnerabilities":[{"cve":{"id":"CVE-2021-29945","sourceIdentifier":"security@mozilla.org","published":"2021-06-24T14:15:09.763","lastModified":"2024-11-21T06:02:02.030","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88."},{"lang":"es","value":"El JIT de WebAssembly podía calcular mal el tamaño de un tipo de retorno, lo que podía conllevar a una lectura nula y resultar en un bloqueo. *Nota: Este problema sólo afectaba a las plataformas x86-32. Otras plataformas no están afectadas. Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 78.10, Thunderbird versiones anteriores a 78.10 y Firefox versiones anteriores a 88"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:N/A:P","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-682"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:x86:*","versionEndExcluding":"88.0","matchCriteriaId":"93A024F9-E2A3-4F13-83A3-879EAC032592"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:x86:*","versionEndExcluding":"78.10","matchCriteriaId":"504327C0-E11F-4EAC-9ED3-8BEA4C40DD0C"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:x86:*","versionEndExcluding":"78.10","matchCriteriaId":"65A9C7EC-D89C-4C03-841E-9DFED53E5795"}]}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1700690","source":"security@mozilla.org","tags":["Issue Tracking","Permissions Required","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-14/","source":"security@mozilla.org","tags":["Release Notes","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-15/","source":"security@mozilla.org","tags":["Release Notes","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-16/","source":"security@mozilla.org","tags":["Release Notes","Vendor Advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1700690","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Permissions Required","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-14/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-15/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-16/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Vendor Advisory"]}]}}]}