Risk Letters

Exploited vulnerability

CVE-2026-20316

TLP:CLEAR

Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability

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.

Facts

  • Vendor: Cisco
  • Product: Secure Firewall Management Center (FMC)
  • CVSS: 5.3
  • EPSS (probability of exploitation within 30 days): 35.1 %
  • On CISA's Known Exploited Vulnerabilities list since: 29 July 2026
  • First known exploitation: 29 July 2026
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 1 August 2026
  • Weakness: CWE-259
  • First seen by Risk Letters: 29 July 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD