CVE-2026-20058
Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Denial of Service Vulnerability
- State
- Published
- Severity
- 5.8 Medium
- Published
- Mar 4, 2026
- Updated
- Mar 4, 2026
- Reserved
- Oct 8, 2025
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.8 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L | cisco |
Weaknesses
- CWE-786 Access of Memory Location Before Start of Buffer
Affected Products
| Product | Versions |
|---|---|
Cisco Secure Firewall Threat Defense (FTD) SoftwareCisco |
|
Cisco UTD SNORT IPS Engine SoftwareCisco |
|
References
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