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CVE-2026-20064

MEDIUMCVSS 6.5/10EPSS 0.10%

Last modified

CVE-2026-20064 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.10% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
0.10%

1.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense Software6.2.3
CiscoFirepower Threat Defense Software6.4.0
CiscoFirepower Threat Defense Software6.4.0.1
CiscoFirepower Threat Defense Software6.4.0.2
CiscoFirepower Threat Defense Software6.4.0.3
CiscoFirepower Threat Defense Software6.4.0.4
CiscoFirepower Threat Defense Software6.4.0.5
CiscoFirepower Threat Defense Software6.4.0.6
CiscoFirepower Threat Defense Software6.4.0.7
CiscoFirepower Threat Defense Software6.4.0.8
CiscoFirepower Threat Defense Software6.4.0.9
CiscoFirepower Threat Defense Software6.4.0.10
CiscoFirepower Threat Defense Software6.4.0.11
CiscoFirepower Threat Defense Software6.4.0.12
CiscoFirepower Threat Defense Software6.4.0.13
CiscoFirepower Threat Defense Software6.4.0.14
CiscoFirepower Threat Defense Software6.4.0.15
CiscoFirepower Threat Defense Software6.4.0.16
CiscoFirepower Threat Defense Software6.4.0.17
CiscoFirepower Threat Defense Software6.4.0.18
CiscoFirepower Threat Defense Software7.0.0
CiscoFirepower Threat Defense Software7.0.0.1
CiscoFirepower Threat Defense Software7.0.1
CiscoFirepower Threat Defense Software7.0.1.1
CiscoFirepower Threat Defense Software7.0.2
CiscoFirepower Threat Defense Software7.0.2.1
CiscoFirepower Threat Defense Software7.0.3
CiscoFirepower Threat Defense Software7.0.4
CiscoFirepower Threat Defense Software7.0.5
CiscoFirepower Threat Defense Software7.0.6
CiscoFirepower Threat Defense Software7.0.6.1
CiscoFirepower Threat Defense Software7.0.6.2
CiscoFirepower Threat Defense Software7.0.6.3
CiscoFirepower Threat Defense Software7.0.7
CiscoFirepower Threat Defense Software7.0.8
CiscoFirepower Threat Defense Software7.0.8.1
CiscoFirepower Threat Defense Software7.1.0
CiscoFirepower Threat Defense Software7.1.0.1
CiscoFirepower Threat Defense Software7.1.0.2
CiscoFirepower Threat Defense Software7.1.0.3
CiscoFirepower Threat Defense Software7.2.0
CiscoFirepower Threat Defense Software7.2.0.1
CiscoFirepower Threat Defense Software7.2.1
CiscoFirepower Threat Defense Software7.2.2
CiscoFirepower Threat Defense Software7.2.3
CiscoFirepower Threat Defense Software7.2.4
CiscoFirepower Threat Defense Software7.2.4.1
CiscoFirepower Threat Defense Software7.2.5
CiscoFirepower Threat Defense Software7.2.5.1
CiscoFirepower Threat Defense Software7.2.5.2

Showing 50 of 76 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-20064?
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.
How severe is CVE-2026-20064?
CVE-2026-20064 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.10% probability of exploitation in the next 30 days.
How do I fix CVE-2026-20064?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20064?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST