{"id":"CVE-2026-20056","state":"PUBLISHED","title":"Cisco Secure Web Appliance TBD  Bypass Vulnerability","description":"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. ","publishedAt":"2026-02-04T16:11:48.273Z","updatedAt":"2026-02-04T16:40:11.391Z","severity":{"score":4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco Secure Web Appliance"],"affected":[{"vendor":"Cisco","product":"Cisco Secure Web Appliance","defaultStatus":"unknown","versions":[{"version":"11.8.0-453","status":"affected"},{"version":"12.5.3-002","status":"affected"},{"version":"12.0.3-007","status":"affected"},{"version":"12.0.3-005","status":"affected"},{"version":"14.1.0-032","status":"affected"},{"version":"14.1.0-047","status":"affected"},{"version":"14.1.0-041","status":"affected"},{"version":"12.0.4-002","status":"affected"},{"version":"14.0.2-012","status":"affected"},{"version":"11.8.0-414","status":"affected"},{"version":"12.0.1-268","status":"affected"},{"version":"11.8.1-023","status":"affected"},{"version":"11.8.3-021","status":"affected"},{"version":"11.8.3-018","status":"affected"},{"version":"12.5.1-011","status":"affected"},{"version":"11.8.4-004","status":"affected"},{"version":"12.5.2-007","status":"affected"},{"version":"12.5.2-011","status":"affected"},{"version":"14.5.0-498","status":"affected"},{"version":"12.5.4-005","status":"affected"},{"version":"12.5.4-011","status":"affected"},{"version":"12.0.5-011","status":"affected"},{"version":"14.0.3-014","status":"affected"},{"version":"12.5.5-004","status":"affected"},{"version":"12.5.5-005","status":"affected"},{"version":"12.5.5-008","status":"affected"},{"version":"14.0.4-005","status":"affected"},{"version":"14.5.1-008","status":"affected"},{"version":"14.5.1-016","status":"affected"},{"version":"15.0.0-355","status":"affected"},{"version":"15.0.0-322","status":"affected"},{"version":"12.5.6-008","status":"affected"},{"version":"15.1.0-287","status":"affected"},{"version":"14.5.2-011","status":"affected"},{"version":"15.2.0-116","status":"affected"},{"version":"14.0.5-007","status":"affected"},{"version":"15.2.0-164","status":"affected"},{"version":"14.5.1-510","status":"affected"},{"version":"12.0.2-012","status":"affected"},{"version":"12.0.2-004","status":"affected"},{"version":"14.5.1-607","status":"affected"},{"version":"14.5.3-033","status":"affected"},{"version":"15.0.1-004","status":"affected"},{"version":"15.2.1-011","status":"affected"},{"version":"14.5.0-673","status":"affected"},{"version":"14.5.0-537","status":"affected"},{"version":"12.0.1-334","status":"affected"},{"version":"14.0.1-503","status":"affected"},{"version":"14.0.1-053","status":"affected"},{"version":"11.8.0-429","status":"affected"},{"version":"14.0.1-040","status":"affected"},{"version":"14.0.1-014","status":"affected"},{"version":"12.5.1-043","status":"affected"},{"version":"15.2.2-009","status":"affected"},{"version":"15.5.0-566","status":"affected"},{"version":"15.2.3-007","status":"affected"},{"version":"15.5.0-574","status":"affected"},{"version":"15.5.0-710","status":"affected"},{"version":"15.2.4-022","status":"affected"},{"version":"15.5.1-002","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-archive-bypass-Scx2e8zF"],"weaknesses":["CWE-494"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20056.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20056","state":"PUBLISHED","datePublished":"2026-02-04T16:11:48.273Z","dateUpdated":"2026-02-04T16:40:11.391Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2025-10-08T11:59:15.356Z"},"containers":{"cna":{"title":"Cisco Secure Web Appliance TBD  Bypass Vulnerability","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. "}],"affected":[{"vendor":"Cisco","product":"Cisco Secure Web Appliance","defaultStatus":"unknown","versions":[{"version":"11.8.0-453","status":"affected"},{"version":"12.5.3-002","status":"affected"},{"version":"12.0.3-007","status":"affected"},{"version":"12.0.3-005","status":"affected"},{"version":"14.1.0-032","status":"affected"},{"version":"14.1.0-047","status":"affected"},{"version":"14.1.0-041","status":"affected"},{"version":"12.0.4-002","status":"affected"},{"version":"14.0.2-012","status":"affected"},{"version":"11.8.0-414","status":"affected"},{"version":"12.0.1-268","status":"affected"},{"version":"11.8.1-023","status":"affected"},{"version":"11.8.3-021","status":"affected"},{"version":"11.8.3-018","status":"affected"},{"version":"12.5.1-011","status":"affected"},{"version":"11.8.4-004","status":"affected"},{"version":"12.5.2-007","status":"affected"},{"version":"12.5.2-011","status":"affected"},{"version":"14.5.0-498","status":"affected"},{"version":"12.5.4-005","status":"affected"},{"version":"12.5.4-011","status":"affected"},{"version":"12.0.5-011","status":"affected"},{"version":"14.0.3-014","status":"affected"},{"version":"12.5.5-004","status":"affected"},{"version":"12.5.5-005","status":"affected"},{"version":"12.5.5-008","status":"affected"},{"version":"14.0.4-005","status":"affected"},{"version":"14.5.1-008","status":"affected"},{"version":"14.5.1-016","status":"affected"},{"version":"15.0.0-355","status":"affected"},{"version":"15.0.0-322","status":"affected"},{"version":"12.5.6-008","status":"affected"},{"version":"15.1.0-287","status":"affected"},{"version":"14.5.2-011","status":"affected"},{"version":"15.2.0-116","status":"affected"},{"version":"14.0.5-007","status":"affected"},{"version":"15.2.0-164","status":"affected"},{"version":"14.5.1-510","status":"affected"},{"version":"12.0.2-012","status":"affected"},{"version":"12.0.2-004","status":"affected"},{"version":"14.5.1-607","status":"affected"},{"version":"14.5.3-033","status":"affected"},{"version":"15.0.1-004","status":"affected"},{"version":"15.2.1-011","status":"affected"},{"version":"14.5.0-673","status":"affected"},{"version":"14.5.0-537","status":"affected"},{"version":"12.0.1-334","status":"affected"},{"version":"14.0.1-503","status":"affected"},{"version":"14.0.1-053","status":"affected"},{"version":"11.8.0-429","status":"affected"},{"version":"14.0.1-040","status":"affected"},{"version":"14.0.1-014","status":"affected"},{"version":"12.5.1-043","status":"affected"},{"version":"15.2.2-009","status":"affected"},{"version":"15.5.0-566","status":"affected"},{"version":"15.2.3-007","status":"affected"},{"version":"15.5.0-574","status":"affected"},{"version":"15.5.0-710","status":"affected"},{"version":"15.2.4-022","status":"affected"},{"version":"15.5.1-002","status":"affected"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-archive-bypass-Scx2e8zF","name":"cisco-sa-wsa-archive-bypass-Scx2e8zF"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","baseScore":4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-494","lang":"en","description":"Download of Code Without Integrity Check","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2026-02-04T16:11:48.273Z"},"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"source":{"advisory":"cisco-sa-wsa-archive-bypass-Scx2e8zF","discovery":"EXTERNAL","defects":["CSCwq69761"]}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-04T16:40:05.362057Z","id":"CVE-2026-20056","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-04T16:40:11.391Z"}}]}}}