Product:
Cisco Secure Firewall
Summary
A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance Software and Cisco Secure Firewall Threat Defense Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of HTTP requests. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser in use and conduct browser-based attacks, including cross-site scripting attacks.
Details
| Severity | Base Score | CVE |
|---|---|---|
| MEDIUM | 4.3 | CVE-2026-20069 |
Exploitation
An attacker could exploit this vulnerability by persuading a user to visit a specially crafted website that sends malicious HTTP requests to a device running Cisco Secure Firewall ASA Software or Cisco Secure FTD Software with web services endpoints supporting VPN features enabled. The attacker needs the user to interact with the malicious site to trigger the exploit, which can lead to browser-based attacks.
Affected Products
- Cisco Secure Firewall Adaptive Security Appliance Software: Affected by improper validation of HTTP requests, allowing potential browser-based attacks.
- Cisco Secure Firewall Threat Defense Software: Similar vulnerability as ASA Software, enabling exploitation through crafted HTTP requests.
Mitigation
To mitigate this vulnerability, users should ensure that web services endpoints supporting VPN features are disabled if not in use. Additionally, users should be cautious about the websites they visit and avoid interacting with untrusted links.