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.
This 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.
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History
Wed, 04 Feb 2026 17:15:00 +0000
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ssvc
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Wed, 04 Feb 2026 16:30:00 +0000
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| 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. This 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. | |
| Title | Cisco Secure Web Appliance TBD Bypass Vulnerability | |
| Weaknesses | CWE-494 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-02-04T16:40:11.391Z
Reserved: 2025-10-08T11:59:15.356Z
Link: CVE-2026-20056
Updated: 2026-02-04T16:40:08.657Z
Status : Received
Published: 2026-02-04T17:16:13.927
Modified: 2026-02-04T17:16:13.927
Link: CVE-2026-20056
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OpenCVE Enrichment
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