CVE-2021-38703

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:kpn:experia_wifi_firmware:1.00.15:*:*:*:*:*:*:*", "matchCriteriaId": "637466A4-287A-41F1-A3F5-B53E5C6E5098", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:kpn:experia_wifi:-:*:*:*:*:*:*:*", "matchCriteriaId": "6A6A6DAB-4CFF-4F19-A732-2BD07D376688", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Wireless devices running certain Arcadyan-derived firmware (such as KPN Experia WiFi 1.00.15) do not properly sanitise user input to the syslog configuration form. An authenticated remote attacker could leverage this to alter the device configuration and achieve remote code execution. This can be exploited in conjunction with CVE-2021-20090."}, {"lang": "es", "value": "Unos dispositivos inal\u00e1mbricos que ejecutan determinados firmware derivados de Arcadyan (como KPN Experia WiFi versi\u00f3n 1.00.15) no sanean correctamente la entrada del usuario en el formulario de configuraci\u00f3n del syslog. Un atacante remoto autenticado podr\u00eda aprovechar esto para alterar la configuraci\u00f3n del dispositivo y lograr una ejecuci\u00f3n de c\u00f3digo remota. Esto puede ser explotado en conjunto con CVE-2021-20090"}], "id": "CVE-2021-38703", "lastModified": "2026-06-17T04:02:37.387", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 9.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-09-01T12:15:07.667", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://7bits.nl/journal/posts/cve-2021-38703-kpn-experia-wifi-root-shell/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.kpnwebshop.com/modems-routers/producten/experia-wifi/2"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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