Cisco · Secure Firewall Management Center (FMC)
CVE-2026-20316
Cisco Secure Firewall Management Center Software Static Credential Vulnerability
Qué es
A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems.
This vulnerability is due to the presence of static user credentials for a low-privileged account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.
Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges.
CISA: Cisco Secure Firewall Management Center (FMC) formerly known as Firepower Management Center contains a use of hard-coded password vulnerability that could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems.
Qué hacer
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Plazo para las agencias federales de EE. UU.: 1 de agosto de 2026
Más fallos explotados de Cisco
| Añadido | Vulnerabilidad | Producto | Gravedad | Prob. de ataque |
|---|---|---|---|---|
| 19 mar 2026 | Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data | Secure Firewall Management Center (FMC) | Crítica 10,0 | 43% |
| 14 oct 2026 | Relative Path Traversal | Secure Email Gateway | Crítica 9,8 | 2,2% |
| 30 sept 2026 | Hex Encoding | Catalyst SD-WAN Manager | Crítica 9,8 | 39% |
| 16 sept 2026 | Incorrect Use of Privileged APIs | Identity Services Engine | Crítica 10,0 | 76% |
| 14 sept 2026 | SQL Injection | Secure Email Gateway | Crítica 9,8 | 30% |
| 9 sept 2026 | Firewall Management Center Authentication Bypass Using an Alternate Path or Channel | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | Crítica 10,0 | 88% |
| 11 ago 2026 | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) | Alto 8,6 | 1,0% |
| 13 jul 2026 | Cross-Site Request Forgery | IOS | Alto 8,1 | 34% |
Fuentes: Known Exploited Vulnerabilities (CISA, dominio público), CVE records (cve.org) y EPSS (FIRST). La probabilidad de ataque es la estimación EPSS de que alguien intente explotar el fallo en los próximos 30 días.