Hard-coded Password Vulnerability in Cisco Secure Firewall Management Center

Historical catalog analysis: CISA added this entry on July 29, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2026-20316 is a vulnerability involving the use of hard-coded passwords (CWE-259) within the Cisco Secure Firewall Management Center (FMC), previously known as Firepower Management Center. This flaw could allow an unauthenticated, remote attacker to log in to an affected system using a low-privileged account. Once authenticated via these static credentials, the attacker could gain access to sensitive data stored within the impacted systems.

Exposure and applicability

This vulnerability is applicable to healthcare organizations utilizing Cisco FMC to manage their network security infrastructure. Because the FMC serves as a centralized management hub for firewall policies and perimeter defenses, its compromise represents a significant risk to the integrity of the secure zones where electronic Protected Health Information (ePHI) is stored and transmitted.

While the source does not specify which versions are affected, the vulnerability’s inclusion in the CISA Known Exploited Vulnerabilities catalog indicates it is a priority for remediation. Healthcare security leaders should evaluate whether their FMC instances are exposed to the internet or accessible from untrusted network segments, as this increases the likelihood of remote exploitation.

Remediation priorities

Our analysis suggests that healthcare providers and business associates prioritize the following actions based on the risk to patient data environments:

1. Apply Vendor Mitigations: The primary priority is to implement the mitigations provided by Cisco. This addresses the root cause—the hard-coded password—and reduces the likelihood of unauthorized remote access.
2. Restrict Management Access: To limit potential damage, network administrators should ensure that the FMC management interface is not exposed to the public internet and is restricted to authorized administrative networks via strict Access Control Lists (ACLs).
3. Review System Logs: Security teams should analyze authentication logs for any unauthorized logins using low-privileged accounts that do not correlate with known administrative activity.

How to validate remediation

To verify that exposure has been reduced, organizations can perform the following checks:
* Version Verification: Confirm that the installed FMC software version matches the patched or mitigated versions specified in the vendor’s security advisory.
* Access Control Audit: Validate that the management interface is unreachable from outside the designated secure management VLAN or VPN.
* Credential Testing: In a non-production environment, security teams can coordinate with clinical engineering to verify that known static credentials no longer grant access to the system.

Limits and open questions

It remains unknown whether this vulnerability has been used in active ransomware campaigns. Additionally, while the source notes that attackers could access “sensitive data,” it is not explicitly confirmed if this data includes ePHI or configuration secrets that could lead to further lateral movement within a healthcare network. Applying vendor mitigations addresses this specific hard-coded password flaw but does not eliminate all other potential vulnerabilities within the FMC platform.

Source and editorial note

CVE-2026-20316: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability · Source date: July 29, 2026 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: August 01, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 01, 2026 at 00:44 UTC.

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