Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability (CVE-2026-20316)
Severity: medium · Patch status: unknown · Since 2026-07-29 · CVE-2026-20316
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. CISA added CVE-2026-20316 to its Known Exploited Vulnerabilities catalog on Jul 29, 2026, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- 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.
- US federal agencies must remediate by Aug 1, 2026 (BOD 22-01); treat that as the outer limit.
Sources
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