Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since July 29, 2026.
CVE-2026-20316
Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability
Cisco · Secure Firewall Management Center (FMC)
Added to KEV July 29, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-20316
- CWE
- CWE-259
- Affected products
- Secure Firewall Management Center (FMC) · Cisco Secure Firewall Management Center (FMC) · Cisco
What happened
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.
What it means for your business
Cisco Secure Firewall Management Center (FMC) is listed in CISA's Known Exploited Vulnerabilities catalog (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 remediation due date: 2026-08-01. If you need help checking exposure, call (864) 335-9223.
Required action
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.
CISA due date: August 1, 2026
Sources
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