CVE-2026-20058
Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Denial of Service Vulnerability
CVSS Score
5.8
EPSS Score
0.0%
EPSS Percentile
0th
Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition.
| CWE | CWE-786 |
| Vendor | cisco |
| Product | cisco secure firewall threat defense (ftd) software |
| Ecosystems | |
| Industries | NetworkingTelecommunications |
| Published | Mar 4, 2026 |
| Last Updated | Mar 4, 2026 |
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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
7.2.0 7.2.0.1 7.2.1 7.3.0 7.2.2 7.2.3 7.3.1 7.2.4 7.2.5 7.2.4.1 7.3.1.1 7.4.0 7.2.5.1 7.4.1 7.2.6 7.4.1.1 7.2.7 7.2.5.2 7.3.1.2 7.2.8 7.6.0 7.4.2 7.2.8.1 7.4.2.1 7.2.9 7.7.0 7.4.2.2 7.2.10 7.6.1 7.4.2.3 7.6.2 7.7.10 7.6.2.1 7.7.10.1 7.4.2.4 7.2.10.2 7.4.3
Cisco / Cisco UTD SNORT IPS Engine Software
17.9.3a 17.12.1a 17.12.2 17.13.1a 17.9.5a 17.12.3 17.14.1a 17.12.4 17.12.3a 17.15.1a 17.9.6 17.16.1a 17.12.4a 17.15.2c 17.12.4b 17.15.2a 17.12.5 17.17.1 17.12.5a 17.15.3a 17.15.3 17.12.5b 17.12.5c 17.15.4 17.18.1 17.18.1a 17.12.6 17.15.4c 17.12.5d 17.18.2