Product:
Secure Firewall Adaptive Security Appliance
Summary
A vulnerability in the Remote Access SSL VPN, HTTP management and MUS functionality of Cisco Secure Firewall Adaptive Security Appliance Software and Secure Firewall Threat Defense Software could allow an unauthenticated remote attacker to exhaust device memory resulting in a denial of service condition requiring a manual reboot. This vulnerability is due to trusting user input without validation. An attacker could exploit this vulnerability by sending crafted packets to the Remote Access SSL VPN server.
Details
| Severity | Base Score | CVE |
|---|---|---|
| MEDIUM | 5.3 | CVE-2026-20106 |
Exploitation
An attacker can exploit this vulnerability by sending specially crafted packets to the Remote Access SSL VPN server. If successful, this could lead to the device becoming unresponsive, resulting in a denial of service condition that necessitates a manual reboot to restore functionality.
Affected Products
- Secure Firewall Adaptive Security Appliance: Affected by the vulnerability in its Remote Access SSL VPN functionality.
- Secure Firewall Threat Defense: Also impacted by the same vulnerability affecting its Remote Access SSL VPN capabilities.
Mitigation
To mitigate this vulnerability, it is recommended to validate user input properly and implement security measures to prevent unauthorized access. Regular updates and patches from Cisco should be applied to ensure that the device is protected against known vulnerabilities.