CVE-2026-20056

{"id": "CVE-2026-20056", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "psirt@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 4.0, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.2}]}, "published": "2026-02-04T17:16:13.927", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-archive-bypass-Scx2e8zF", "source": "psirt@cisco.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-494"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the Dynamic Vectoring and Streaming (DVS) Engine implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass the anti-malware scanner, allowing malicious archive files to be downloaded.\r\n\r\nThis vulnerability is due to improper handling of certain archive files. An attacker could exploit this vulnerability by sending a crafted archive file, which should be blocked, through an affected device. A successful exploit could allow the attacker to bypass the anti-malware scanner and download malware onto an end user workstation. The downloaded malware will not automatically execute unless the end user extracts and launches the malicious file. "}, {"lang": "es", "value": "Una vulnerabilidad en la implementaci\u00f3n del motor Dynamic Vectoring and Streaming (DVS) de Cisco AsyncOS Software para Cisco Secure Web Appliance podr\u00eda permitir a un atacante remoto no autenticado eludir el esc\u00e1ner anti-malware, permitiendo la descarga de archivos comprimidos maliciosos.\n\nEsta vulnerabilidad se debe a un manejo inadecuado de ciertos archivos comprimidos. Un atacante podr\u00eda explotar esta vulnerabilidad enviando un archivo comprimido manipulado, que deber\u00eda ser bloqueado, a trav\u00e9s de un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante eludir el esc\u00e1ner anti-malware y descargar malware en una estaci\u00f3n de trabajo de usuario final. El malware descargado no se ejecutar\u00e1 autom\u00e1ticamente a menos que el usuario final extraiga y ejecute el archivo malicioso."}], "lastModified": "2026-04-15T00:35:42.020", "sourceIdentifier": "psirt@cisco.com"}