CVE-2025-20183

A vulnerability in a policy-based Cisco Application Visibility and Control (AVC) implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to evade the antivirus scanner and download a malicious file onto an endpoint.  The vulnerability is due to improper handling of a crafted range request header. An attacker could exploit this vulnerability by sending an HTTP request with a crafted range request header through the affected device. A successful exploit could allow the attacker to evade the antivirus scanner and download malware onto the endpoint without detection by Cisco Secure Web Appliance.

• cisco asyncos 11.8.0-414 • cisco asyncos 11.8.0-429 • cisco asyncos 11.8.0-453 • cisco asyncos 11.8.1-023 • cisco asyncos 11.8.3-018 • cisco asyncos 11.8.3-021 • cisco asyncos 11.8.4-004 • cisco asyncos 12.0.1-268 • cisco asyncos 12.0.1-334 • cisco asyncos 12.0.2-004 • cisco asyncos 12.0.2-012 • cisco asyncos 12.0.3-005 • cisco asyncos 12.0.3-007 • cisco asyncos 12.0.4-002 • cisco asyncos 12.0.5-011 • cisco asyncos 12.5.1-011 • cisco asyncos 12.5.1-043 • cisco asyncos 12.5.2-007 • cisco asyncos 12.5.2-011 • cisco asyncos 12.5.3-002 • cisco asyncos 12.5.4-005 • cisco asyncos 12.5.4-011 • cisco asyncos 12.5.5-004 • cisco asyncos 12.5.5-005 • cisco asyncos 12.5.5-008 • cisco asyncos 12.5.6-008 • cisco asyncos 14.0.1-014 • cisco asyncos 14.0.1-040 • cisco asyncos 14.0.1-053 • cisco asyncos 14.0.1-503 • cisco asyncos 14.0.2-012 • cisco asyncos 14.0.3-014 • cisco asyncos 14.0.4-005 • cisco asyncos 14.0.5-007 • cisco asyncos 14.1.0-032 • cisco asyncos 14.1.0-041 • cisco asyncos 14.1.0-047 • cisco asyncos 14.5.0-498 • cisco asyncos 14.5.0-537 • cisco asyncos 14.5.0-673 • cisco asyncos 14.5.1-008 • cisco asyncos 14.5.1-016 • cisco asyncos 14.5.1-510 • cisco asyncos 14.5.1-607 • cisco asyncos 14.5.2-011 • cisco asyncos 14.5.3-033 • cisco asyncos 15.0.0-322 • cisco asyncos 15.0.0-355 • cisco asyncos 15.1.0-287 • cisco asyncos 15.2.0-116 • cisco asyncos 15.2.0-164