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buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls."},{"lang":"es","value":"Una vulnerabilidad de desbordamiento de búfer en SonicOS permite a un atacante remoto causar una denegación de servicio (DoS) mediante el envío de una petición especialmente diseñada. Esta vulnerabilidad afecta a las plataformas SonicOS Gen5, Gen6, Gen7 y a los firewalls virtuales SonicOSv"}],"id":"CVE-2021-20027","lastModified":"2026-11-09T14:43:41.437","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":5.0,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","version":"2.0"},"exploitabilityScore":10.0,"impactScore":2.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-06-14T23:15:07.473","references":[{"source":"PSIRT@sonicwall.com","tags":["Mitigation","Vendor Advisory"],"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mitigation","Vendor Advisory"],"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016"}],"sourceIdentifier":"PSIRT@sonicwall.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-120"}],"source":"PSIRT@sonicwall.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-120"}],"source":"nvd@nist.gov","type":"Primary"}]}