CVE-2021-21739

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{"affected": [{"affectedData": [{"product": "<ZXCTN 6120H>", "vendor": "n/a", "versions": [{"status": "affected", "version": "<V5.10.00B24>"}]}], "source": "psirt@zte.com.cn"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zte:zxctn_6120h_firmware:5.10.00b24:*:*:*:*:*:*:*", "matchCriteriaId": "F45B4A7D-9A8F-4321-B150-8E9A01D5DB20", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zte:zxctn_6120h:-:*:*:*:*:*:*:*", "matchCriteriaId": "1A2F1EC9-37C0-4A1C-B046-8E27CA25F069", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A ZTE's product of the transport network access layer has a security vulnerability. Because the system does not sufficiently verify the data reliability, attackers could replace an authenticated optical module on the equipment with an unauthenticated one, bypassing system authentication and detection, thus affecting signal transmission. This affects: <ZXCTN 6120H><V5.10.00B24>"}, {"lang": "es", "value": "Un producto de ZTE de la capa de acceso a la red de transporte presenta una vulnerabilidad de seguridad. Debido a que el sistema no verifica suficientemente la fiabilidad de los datos, unos atacantes podr\u00edan sustituir un m\u00f3dulo \u00f3ptico autenticado en el equipo por otro no autenticado, omitiendo la autentificaci\u00f3n y detecci\u00f3n del sistema, afectando as\u00ed a la transmisi\u00f3n de la se\u00f1al. Esto afecta a: "}], "id": "CVE-2021-21739", "lastModified": "2026-06-17T03:36:04.173", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "PHYSICAL", "availabilityImpact": "NONE", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-08-05T20:15:07.703", "references": [{"source": "psirt@zte.com.cn", "tags": ["Vendor Advisory"], "url": "https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017024"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017024"}], "sourceIdentifier": "psirt@zte.com.cn", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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