{"affected":[{"affectedData":[{"product":"EIP Stack Group","vendor":"n/a","versions":[{"status":"affected","version":"EIP Stack Group OpENer 2.3 ,EIP Stack Group OpENer development commit 8c73bf3"}]}],"source":"talos-cna@cisco.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:opener_project:opener:2.3:*:*:*:*:*:*:*","matchCriteriaId":"93AB5D96-9EA6-4329-8BB7-78BD6271A055","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted network request can lead to an out-of-bounds read."},{"lang":"es","value":"Se presenta una vulnerabilidad de divulgación de información en la funcionalidad del manejador Ethernet/IP UDP de Ethernet/IP de EIP Stack Group OpENer versión 2.3 y el commit de desarrollo 8c73bf3. Una petición de red especialmente diseñada puede conllevar a una lectura fuera de límites"}],"id":"CVE-2021-21777","lastModified":"2026-06-17T03:36:05.997","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":9.4,"confidentialityImpact":"COMPLETE","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:N/C:C/I:N/A:C","version":"2.0"},"exploitabilityScore":10.0,"impactScore":9.2,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV30":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.0"},"exploitabilityScore":3.9,"impactScore":4.0,"source":"talos-cna@cisco.com","type":"Secondary"}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10.0,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":5.8,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-06-17T11:15:07.707","references":[{"source":"talos-cna@cisco.com","tags":["Exploit","Third Party Advisory"],"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1234"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"],"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1234"}],"sourceIdentifier":"talos-cna@cisco.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-125"}],"source":"nvd@nist.gov","type":"Primary"}]}