CVE-2025-20183: Cisco Secure Web Appliance Range Request Bypass Vulnerability
Description
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.
Classification
CVE ID: CVE-2025-20183
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected Products
Vendor: Cisco
Product: Cisco Secure Web Appliance
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 19.84% (scored less or equal to compared to others)
EPSS Date: 2025-03-06 (when was this score calculated)