OCTOBER 13, 2026
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Case File

CVE-2026-20343

HIGH · CVSS 7.5 EPSS 0.45% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-16 · Last synced 2026-10-13

CyberRota Analysis

AI-Generated

A critical API in Cisco Secure FMC Software is vulnerable due to a lack of authentication, allowing unauthenticated remote attackers to exploit it. This could lead to unauthorized access to sensitive files and excessive consumption of disk space, potentially resulting in a denial-of-service condition. Organizations using Cisco Secure FMC Software should prioritize addressing this vulnerability to protect their sensitive data and maintain system availability.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-20343
Severity
HIGH
CVSS
7.5
EPSS
0.45%
Cisco

Original NVD Description

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.