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CVE-2026-20343

HIGH CVSS: 7.5 Published: 2026-09-16 Modified: 2026-09-18

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.

Affected Platforms

Unknown

Weakness Type

CWE-306

References