CVE-2021-1489: Cisco Firepower Device Manager Software Filesystem Space Exhaustion Denial of Service Vulnerability

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-29 · updated 2026-06-17
Weakness: CWE-400

Description

A vulnerability in filesystem usage management for Cisco Firepower Device Manager (FDM) Software could allow an authenticated, remote attacker to exhaust filesystem resources, resulting in a denial of service (DoS) condition on an affected device. This vulnerability is due to the insufficient management of available filesystem resources. An attacker could exploit this vulnerability by uploading files to the device and exhausting available filesystem resources. A successful exploit could allow the attacker to cause database errors and cause the device to become unresponsive to web-based management. Manual intervention is required to free filesystem resources and return the device to an operational state.

Affected products

Cisco Firepower Device Manager: from 6.4.0 before 6.4.0.12; from 6.5.0 before 6.6.4; from 6.7.0 before 6.7.0.2 — fixed in 6.4.0.12, 6.6.4, 6.7.0.2

How to fix

Upgrade to a fixed version: Cisco Firepower Device Manager 6.4.0.12, 6.6.4, 6.7.0.2. Check the vendor advisory for mitigations.

References

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