{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-02T05:09:28.864","vulnerabilities":[{"cve":{"id":"CVE-2021-25677","sourceIdentifier":"productcert@siemens.com","published":"2021-04-22T21:15:10.207","lastModified":"2024-11-21T05:55:16.807","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), SIMOTICS CONNECT 400 (All versions >= V0.5.0.0 < V1.0.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS client does not properly randomize DNS transaction IDs. That could allow an attacker to poison the DNS cache or spoof DNS resolving."},{"lang":"es","value":"Se ha identificado una vulnerabilidad en Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a la versión V2017.02.3), Nucleus ReadyStart V4 (Todas las versiones anteriores a la versión V4.1.0), Nucleus Source Code (Versiones que incluyen los módulos DNS afectados), SIMOTICS CONNECT 400 (Todas las versiones anteriores a la versión V0.5.0.0), SIMOTICS CONNECT 400 (Todas las versiones posteriores o iguales a la versión V0.5.0.0 anteriores a la versión V1.0.0). El cliente DNS no aleatoriza correctamente los ID de las transacciones DNS. Esto podría permitir a un atacante envenenar la caché DNS o falsificar la resolución DNS"}],"metrics":{"cvssMetricV31":[{"source":"productcert@siemens.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:P/A:N","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"productcert@siemens.com","type":"Secondary","description":[{"lang":"en","value":"CWE-330"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-330"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:siemens:simotics_connect_400_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"0.5.0.0","matchCriteriaId":"374052C8-5A98-4404-B029-72D2404A7036"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:siemens:simotics_connect_400:-:*:*:*:*:*:*:*","matchCriteriaId":"48BFF9EF-D1C1-4107-8D1E-51315C03FFF0"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*","matchCriteriaId":"7A987CFB-4A41-4F82-8C7F-31DE8F0650DE"},{"vulnerable":true,"criteria":"cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*","versionEndExcluding":"2017.02.4","matchCriteriaId":"C2F36C9F-E4F4-4678-B82D-361F4818B66C"},{"vulnerable":true,"criteria":"cpe:2.3:a:siemens:nucleus_readystart_v4:*:*:*:*:*:*:*:*","versionEndExcluding":"4.1.0","matchCriteriaId":"B35FDE44-BE25-431D-B2EE-195ACC5A606C"},{"vulnerable":true,"criteria":"cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:*","matchCriteriaId":"53A38C64-612A-4BC5-83D5-D3FA1C90E0F7"}]}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf","source":"productcert@siemens.com"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf","source":"productcert@siemens.com","tags":["Patch","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf","source":"productcert@siemens.com","tags":["Patch","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]}]}}]}