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. 

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Secure Web Appliance unknown
Version Status Constraints
11.8.0-453 affected —
12.5.3-002 affected —
12.0.3-007 affected —
12.0.3-005 affected —
14.1.0-032 affected —
14.1.0-047 affected —
14.1.0-041 affected —
12.0.4-002 affected —
14.0.2-012 affected —
11.8.0-414 affected —
12.0.1-268 affected —
11.8.1-023 affected —
11.8.3-021 affected —
11.8.3-018 affected —
12.5.1-011 affected —
11.8.4-004 affected —
12.5.2-007 affected —
12.5.2-011 affected —
14.5.0-498 affected —
12.5.4-005 affected —
12.5.4-011 affected —
12.0.5-011 affected —
14.0.3-014 affected —
12.5.5-004 affected —
12.5.5-005 affected —
12.5.5-008 affected —
14.0.4-005 affected —
14.5.1-008 affected —
14.5.1-016 affected —
15.0.0-355 affected —
15.0.0-322 affected —
12.5.6-008 affected —
15.1.0-287 affected —
14.5.2-011 affected —
15.2.0-116 affected —
14.0.5-007 affected —
15.2.0-164 affected —
14.5.1-510 affected —
12.0.2-012 affected —
12.0.2-004 affected —
14.5.1-607 affected —
14.5.3-033 affected —
15.0.1-004 affected —
15.2.1-011 affected —
14.5.0-673 affected —
14.5.0-537 affected —
12.0.1-334 affected —
14.0.1-503 affected —
14.0.1-053 affected —
11.8.0-429 affected —
14.0.1-040 affected —
14.0.1-014 affected —
12.5.1-043 affected —
15.2.2-009 affected —
15.5.0-566 affected —
15.2.3-007 affected —
15.5.0-574 affected —
15.5.0-710 affected —
15.2.4-022 affected —
15.5.1-002 affected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-archive-bypass-Scx2e8zF cve-icon cve-icon
History

Wed, 04 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 04 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
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
References
Metrics cvssV3_1

{'score': 4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-02-04T16:40:11.391Z

Reserved: 2025-10-08T11:59:15.356Z

Link: CVE-2026-20056

cve-icon Vulnrichment

Updated: 2026-02-04T16:40:08.657Z

cve-icon NVD

Status : Received

Published: 2026-02-04T17:16:13.927

Modified: 2026-02-04T17:16:13.927

Link: CVE-2026-20056

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses