Product:
Cisco Secure Web Appliance
Summary
A vulnerability in the Dynamic Vectoring and Streaming Engine implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass the anti-malware scanner. 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.
Details
| Severity | Base Score | CVE |
|---|---|---|
| MEDIUM | 4 | CVE-2026-20056 |
Exploitation
An attacker can exploit this vulnerability by crafting a malicious archive file that is improperly handled by the affected device. By sending this file through the device, the attacker can bypass the anti-malware scanner, allowing the malicious file to be downloaded onto an end user workstation. The malware will not execute automatically unless the end user extracts and launches the file.
Affected Products
- Cisco Secure Web Appliance: Vulnerable due to improper handling of certain archive files, allowing bypass of the anti-malware scanner.
Mitigation
To mitigate this vulnerability, it is recommended to apply the latest updates and patches provided by Cisco for the affected products. Additionally, organizations should implement strict file handling policies and monitor for any suspicious activity related to archive file downloads.