VDB
CVE-2026-20343
CVE-2026-20343
PUBLISHED
CVSS 7.5 HIGH
Reported by cisco · Published September 16, 2026
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.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.0, 7.3.1, 7.3.1.1 |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.0, 7.3.1, 7.3.1.1 |
Timeline
- Sep 16, 2026 Coalition ESS Score
- Sep 16, 2026 CVE Published
- Sep 17, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
- Sep 18, 2026 CVE Updated