CVE-2020-3309

Cisco Firepower Device Manager On-Box Software Arbitrary File Overwrite Vulnerability

HIGH
7.2
CVSS Score
Published: May 6, 2020 at 04:40 PM UTC
Updated: June 17, 2026 at 03:17 AM UTC
2 products affected across 1 vendorFirepower Device Manager on BoxFirepower Threat Defense

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Severity
HIGH7.2
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

A vulnerability in Cisco Firepower Device Manager (FDM) On-Box software could allow an authenticated, remote attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by uploading a malicious file to an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on as well as modify the underlying operating system of an affected device.

Affected

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

v < 6.2.3
Affected range stops below 6.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-787

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