Product:
Cisco Secure Firewall Management Center
Summary
A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root.
Details
| Severity | Base Score | CVE |
|---|---|---|
| CRITICAL | 10 | CVE-2026-20131 |
Exploitation
An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. If successful, the attacker could execute arbitrary code on the device, gaining root privileges. The risk is mitigated if the FMC management interface does not have public internet access.
Affected Products
- Cisco Secure Firewall Management Center: Vulnerable due to insecure deserialization of Java byte streams.
Mitigation
To mitigate this vulnerability, ensure that the web-based management interface is not accessible from the public internet. Additionally, apply any available security patches provided by Cisco to address this issue.