CVE-2026-20005
CVSS Score
5.8
EPSS Score
0.0%
EPSS Percentile
0th
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.
| CWE | CWE-392 |
| Vendor | cisco |
| Product | cisco secure firewall threat defense (ftd) software |
| Ecosystems | |
| Industries | NetworkingTelecommunications |
| Published | Mar 4, 2026 |
| Last Updated | Mar 4, 2026 |
Stay Ahead of the Next One
Get instant alerts for cisco cisco secure firewall threat defense (ftd) software
Be the first to know when new medium vulnerabilities affecting cisco cisco secure firewall threat defense (ftd) software are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Cisco / Cisco Secure Firewall Threat Defense (FTD) Software
7.6.0 7.6.1 7.6.2 7.6.2.1 7.7.0 7.7.10 7.7.10.1
Cisco / Cisco Cyber Vision
3.0.4 3.0.0 3.0.1 3.0.2 3.0.3 3.0.5 3.0.6 3.1.0 3.1.2 3.1.1 3.2.3 3.2.1 3.2.4 3.2.0 3.2.2 4.0.0 4.0.1 4.0.2 4.0.3 4.1.0 4.1.1 4.1.2 4.1.3 4.1.4 4.1.5 4.1.6 4.1.7 4.2.0 4.2.1 4.2.4 4.2.6 4.2.2 4.2.3 4.3.0 4.3.1 4.3.2 4.3.3 4.4.0 4.4.1 4.4.2 4.4.3 5.0.0 5.0.1 5.0.2 5.1.1 5.1.2 5.1.3 5.2.0 5.2.1 5.3.0 5.3.1 5.3.2
Cisco / Cisco UTD SNORT IPS Engine Software
17.2.1r 17.3.1a 17.3.2 17.3.3 17.3.4a 17.3.6 17.3.5 17.3.7 17.3.8 17.4.1a 17.4.2 17.4.1b 17.5.1a 17.6.1a 17.6.2 17.6.3a 17.6.4 17.6.5 17.6.6 17.6.7 17.6.8a 17.7.1a 17.7.2 17.10.1a 17.9.1a 17.9.2a 17.9.3a 17.9.4 17.9.5a 17.9.6 17.9.5e 17.9.5f 17.9.7a 17.9.8 17.9.7b 17.8.1a 17.11.1a 17.12.1a 17.12.2 17.12.3 17.12.4 17.12.4a 17.12.4b 17.12.5 17.12.5a 17.12.5b 17.12.5c 17.12.6 17.12.5d 17.13.1a 17.14.1a 17.15.1a 17.15.2a 17.15.2c 17.15.3 17.15.3a 17.15.4 17.15.4c 17.16.1a 17.17.1 17.18.1a 17.18.2