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CVE-2026-20056

Cisco Secure Web Appliance TBD Bypass Vulnerability

Published
Last modified
published
Not listed in CISA KEV
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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. 

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Cisco Cisco Secure Web Appliance

    11.8.0-453, 12.5.3-002, 12.0.3-007, 12.0.3-005, 14.1.0-032, 14.1.0-047, 14.1.0-041, 12.0.4-002, 14.0.2-012, 11.8.0-414, 12.0.1-268, 11.8.1-023, 11.8.3-021, 11.8.3-018, 12.5.1-011, 11.8.4-004, 12.5.2-007, 12.5.2-011, 14.5.0-498, 12.5.4-005, 12.5.4-011, 12.0.5-011, 14.0.3-014, 12.5.5-004, 12.5.5-005, 12.5.5-008, 14.0.4-005, 14.5.1-008, 14.5.1-016, 15.0.0-355, and 30 more

References 1

sec.cloudapps.cisco.com