CVE-2026-20064
Received
Received - Intake
Improper Input Validation in Cisco FTD Causes DoS
Vulnerability report for CVE-2026-20064, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-03-04
Last updated on: 2026-04-28
Assigner: Cisco Systems, Inc.
Description
Description
A vulnerability in of Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, local attacker to cause the device to unexpectedly reload, causing a denial of service (DoS) condition.
This vulnerability is due to improper validation of user-supplied input. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | firepower_threat_defense_software | 6.2.3 |
| cisco | firepower_threat_defense_software | 6.4.0 |
| cisco | firepower_threat_defense_software | 6.4.0.1 |
| cisco | firepower_threat_defense_software | 6.4.0.3 |
| cisco | firepower_threat_defense_software | 6.4.0.2 |
| cisco | firepower_threat_defense_software | 6.4.0.4 |
| cisco | firepower_threat_defense_software | 6.4.0.5 |
| cisco | firepower_threat_defense_software | 6.4.0.6 |
| cisco | firepower_threat_defense_software | 6.4.0.7 |
| cisco | firepower_threat_defense_software | 6.4.0.8 |
| cisco | firepower_threat_defense_software | 6.4.0.9 |
| cisco | firepower_threat_defense_software | 6.4.0.10 |
| cisco | firepower_threat_defense_software | 6.4.0.11 |
| cisco | firepower_threat_defense_software | 6.4.0.12 |
| cisco | firepower_threat_defense_software | 6.4.0.13 |
| cisco | firepower_threat_defense_software | 6.4.0.14 |
| cisco | firepower_threat_defense_software | 6.4.0.15 |
| cisco | firepower_threat_defense_software | 6.4.0.16 |
| cisco | firepower_threat_defense_software | 6.4.0.17 |
| cisco | firepower_threat_defense_software | 7.0.0 |
| cisco | firepower_threat_defense_software | 7.0.0.1 |
| cisco | firepower_threat_defense_software | 7.0.1 |
| cisco | firepower_threat_defense_software | 7.0.1.1 |
| cisco | firepower_threat_defense_software | 7.0.2 |
| cisco | firepower_threat_defense_software | 7.0.2.1 |
| cisco | firepower_threat_defense_software | 7.0.3 |
| cisco | firepower_threat_defense_software | 7.0.4 |
| cisco | firepower_threat_defense_software | 7.0.5 |
| cisco | firepower_threat_defense_software | 7.0.6 |
| cisco | firepower_threat_defense_software | 7.0.6.1 |
| cisco | firepower_threat_defense_software | 7.1.0 |
| cisco | firepower_threat_defense_software | 7.1.0.1 |
| cisco | firepower_threat_defense_software | 7.1.0.2 |
| cisco | firepower_threat_defense_software | 7.1.0.3 |
| cisco | firepower_threat_defense_software | 7.2.0 |
| cisco | firepower_threat_defense_software | 7.2.0.1 |
| cisco | firepower_threat_defense_software | 7.2.1 |
| cisco | firepower_threat_defense_software | 7.2.2 |
| cisco | firepower_threat_defense_software | 7.2.3 |
| cisco | firepower_threat_defense_software | 7.2.4 |
| cisco | firepower_threat_defense_software | 7.2.4.1 |
| cisco | firepower_threat_defense_software | 7.2.5 |
| cisco | firepower_threat_defense_software | 7.2.5.1 |
| cisco | firepower_threat_defense_software | 7.3.0 |
| cisco | firepower_threat_defense_software | 7.3.1 |
| cisco | firepower_threat_defense_software | 7.3.1.1 |
| cisco | firepower_threat_defense_software | 7.4.0 |
| cisco | firepower_threat_defense_software | 7.4.1 |
| cisco | firepower_threat_defense_software | 7.4.1.1 |
| cisco | firepower_threat_defense_software | 7.3.1.2 |
| cisco | firepower_threat_defense_software | 7.2.8.1 |
| cisco | firepower_threat_defense_software | 7.2.8 |
| cisco | firepower_threat_defense_software | 7.2.5.2 |
| cisco | firepower_threat_defense_software | 7.2.7 |
| cisco | firepower_threat_defense_software | 7.2.6 |
| cisco | firepower_threat_defense_software | 7.0.6.2 |
| cisco | firepower_threat_defense_software | 6.4.0.18 |
| cisco | firepower_threat_defense_software | 7.4.2 |
| cisco | firepower_threat_defense_software | 7.0.6.3 |
| cisco | firepower_threat_defense_software | 7.0.7 |
| cisco | firepower_threat_defense_software | 7.0.8 |
| cisco | firepower_threat_defense_software | 7.0.8.1 |
| cisco | firepower_threat_defense_software | 7.2.9 |
| cisco | firepower_threat_defense_software | 7.4.2.1 |
| cisco | firepower_threat_defense_software | 7.4.2.2 |
| cisco | firepower_threat_defense_software | 7.4.2.3 |
| cisco | firepower_threat_defense_software | 7.4.2.4 |
| cisco | firepower_threat_defense_software | 7.6.0 |
| cisco | firepower_threat_defense_software | 7.7.0 |
| cisco | firepower_threat_defense_software | 7.2.10 |
| cisco | firepower_threat_defense_software | 7.2.10.2 |
| cisco | firepower_threat_defense_software | 7.6.1 |
| cisco | firepower_threat_defense_software | 7.6.2 |
| cisco | firepower_threat_defense_software | 7.6.2.1 |
| cisco | firepower_threat_defense_software | 7.7.10 |
| cisco | firepower_threat_defense_software | 7.7.10.1 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
