CVE-2025-20183

MediumCVSS 5.3/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

Affected software

VendorProductVersions
CiscoCisco Secure Web Appliance11.8.0-453; 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

References

Timeline

Published
Feb 5, 2025
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2025-20183: Medium severity, CVSS 5.3 | Vulnix