CVE-2021-1489

Cisco Firepower Device Manager Software Filesystem Space Exhaustion Denial of Service Vulnerability

MEDIUM

6.5

CVSS Score

Published: April 29, 2021 at 05:31 PM UTC

Updated: June 17, 2026 at 03:31 AM UTC

19 products affected across 1 vendorFirepower Device ManagerFirepower 4110Firepower 4140

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Severity

MEDIUM6.5

Exploit prediction

EPSS 1%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firepower Device Manager · Cisco

95%

6.4.0 ≤ v < 6.4.0.126.5.0 ≤ v < 6.6.46.7.0 ≤ v < 6.7.0.2

Affected range stops below 6.4.0.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.6.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.7.0.2, so it looks safe — our inference, not a vendor statement

cisco-firepower-1010 (environment) · cisco-firepower-1120 (environment) · cisco-firepower-1140 (environment) · cisco-firepower-1150 (environment) · cisco-firepower-2110 (environment) · cisco-firepower-2120 (environment) · cisco-firepower-2130 (environment) · cisco-firepower-2140 (environment) · cisco-firepower-4110 (environment) · cisco-firepower-4112 (environment) · cisco-firepower-4115 (environment) · cisco-firepower-4120 (environment) · cisco-firepower-4125 (environment) · cisco-firepower-4140 (environment) · cisco-firepower-4145 (environment) · cisco-firepower-4150 (environment) · cisco-firepower-9300 (environment)

Firepower Threat Defense · Cisco

60%

All versions

Firepower 1010 · Ciscodevice

80%

All versions

Firepower 1120 · Ciscodevice

80%

All versions

Firepower 1140 · Ciscodevice

80%

All versions