What’s Vulnerable › Vulnerabilities
CVE-2025-20183: Cisco Secure Web Appliance Range Request Bypass Vulnerability
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-02-05 · updated 2026-06-17
- Weakness: CWE-20
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.
Affected products
- Cisco Asyncos: 11.8.0-414, 11.8.0-429, 11.8.0-453, 11.8.1-023, 11.8.3-018, 11.8.3-021 (+45)
References
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