CVE-2026-20343 — Cisco Secure Firewall Management Center Software Information Disclosure and Disk Denial of Service Vulnerability
A vulnerability in a critical API for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to download sensitive files and use unbounded disk space. This…
Published: 2026-09-16 · CVSS: 7.5 · CVSS 3.1
A vulnerability in a critical API for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to download sensitive files and use unbounded disk space. This vulnerability exists because a critical API lacks authentication. An attacker could exploit this vulnerability by repeatedly invoking the API. A successful exploit could allow the attacker to download sensitive files that should be restricted and consume disk space so the device could become unresponsive, causing a DoS condition.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7