CVE-2026-20058
Medium
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.
SeverityMedium
CVSS5.8
Exploit probability—
Product
Cisco Snort
PublishedMar 4, 2026
First seenMar 4, 2026
Weakness typeCWE-786CWE-786
How to fix
Update
- cisco snort3.9.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco snort | 3.0.0-233 ≤ v < 3.9.6.0 | 3.9.6.0 |
| cisco secure_firewall_threat_defense | 7.2.0, 7.2.0.1, 7.2.1, 7.2.2, 7.2.3, 7.2.4, 7.2.4.1, 7.2.5, 7.2.5.1, 7.2.5.2, 7.2.6, 7.2.7, 7.2.8, 7.2.8.1, 7.2.9, 7.2.10, 7.2.10.2, 7.3.0, 7.3.1, 7.3.1.1, 7.3.1.2, 7.4.0, 7.4.1, 7.4.1.1, 7.4.2, 7.4.2.1, 7.4.2.2, 7.4.2.3, 7.4.2.4, 7.4.3, 7.6.0, 7.6.1, 7.6.2, 7.6.2.1, 7.7.0, 7.7.10, 7.7.10.1 | — |
| cisco unified_threat_defense_snort_intrusion_prevention_system_engine | 17.9.3a, 17.9.5a, 17.9.6, 17.12.1a, 17.12.2, 17.12.3, 17.12.3a, 17.12.4, 17.12.4a, 17.12.4b, 17.12.5, 17.12.5a, 17.12.5b, 17.12.5c, 17.12.5d, 17.12.6, 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, 17.18.1, 17.18.1a, 17.18.2 | — |
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