What is CVE-2026-20064?

CVE-2026-20064 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense (Ftd) Software, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-03-04.

How severe is CVE-2026-20064?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Cisco Secure Firewall Threat Defense (Ftd) Software

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…

EPSS: 0.000 (10.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Secure Firewall Threat Defense (Ftd) Software — versions 6.4.0, 6.4.0.1, 6.4.0.3
Cisco Firepower_threat_defense_software — versions 6.2.3, 6.4.0, 6.4.0.1

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

cisco-sa-ftd-cmd-inj-mTzGZexf (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20064?: CVE-2026-20064 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense (Ftd) Software, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-03-04.
How severe is CVE-2026-20064?: Medium severity. CVSS v3 base score is 6.5 out of 10.