Improper input validation in Cisco Asyncos
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Cisco Asyncos — versions 11.8.0-414, 11.8.0-429, 11.8.0-453
- Cisco Secure Web Appliance — versions 11.8.0-453, 12.5.3-002, 12.0.3-007
- Cisco Secure Web Appliance S196
- Cisco Secure Web Appliance S396
- Cisco Secure Web Appliance S696
- Cisco Secure Web Appliance Virtual S1000v
- Cisco Secure Web Appliance Virtual S100v
- Cisco Secure Web Appliance Virtual S300v
- Cisco Secure Web Appliance Virtual S600v
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20183?
- CVE-2025-20183 is a medium-severity vulnerability in Cisco Asyncos, classified under Improper Input Validation. CVSS score: 5.8/10. Published 2025-02-05.
- How severe is CVE-2025-20183?
- Medium severity. CVSS v3 base score is 5.8 out of 10.