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. Source description excerpt; complete tracked detail loads below.

NVD published: Jul 29, 2026 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

Cisco — Secure Firewall Management Center (FMC). Product-level identification only; no affected-version conclusion is available from this field.

NVD published: Jul 29, 2026 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

Act · 451.2

Tracker decision tier from the evidence detailed below · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

Active exploitation · CISA KEV · VulnCheck KEV · ENISA exploited-vulnerability catalog

Active since: Jul 29, 2026 · CISA KEV added: Jul 29, 2026 · VulnCheck KEV added: Jul 29, 2026 · ENISA added: Jul 29, 2026 · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026

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.

Tracked source remediation field · Source record updated: Aug 8, 2026 · Tracker snapshot: Aug 8, 2026