CVE-2026-20064 describes a denial-of-service vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software. An authenticated, low-privileged local attacker can exploit improper input validation via crafted CLI commands, causing the device to unexpectedly reload. This vulnerability has a CVSS score of 6.5 (Medium), indicating a local attack vector with low complexity, leading to high availability impact. There is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed on CISA's KEV catalog, suggesting it is not actively exploited. Community discussion and media coverage are minimal, with only one mention and one article identified.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
6.2.3CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense_software:6.2.3:*:*:*:*:*:*:* | ||
6.4.0CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense_software:6.4.0:*:*:*:*:*:*:* | ||
6.4.0.1CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense_software:6.4.0.1:*:*:*:*:*:*:* | ||
6.4.0.2CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense_software:6.4.0.2:*:*:*:*:*:*:* | ||
6.4.0.3CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense_software:6.4.0.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.