CVE-2026-20058
Last modified
CVE-2026-20058 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Snort | >= 3.0.0-233, < 3.9.6.0 |
| Cisco | Secure Firewall Threat Defense | 7.2.0 |
| Cisco | Secure Firewall Threat Defense | 7.2.0.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.2 |
| Cisco | Secure Firewall Threat Defense | 7.2.3 |
| Cisco | Secure Firewall Threat Defense | 7.2.4 |
| Cisco | Secure Firewall Threat Defense | 7.2.4.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.5 |
| Cisco | Secure Firewall Threat Defense | 7.2.5.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.5.2 |
| Cisco | Secure Firewall Threat Defense | 7.2.6 |
| Cisco | Secure Firewall Threat Defense | 7.2.7 |
| Cisco | Secure Firewall Threat Defense | 7.2.8 |
| Cisco | Secure Firewall Threat Defense | 7.2.8.1 |
| Cisco | Secure Firewall Threat Defense | 7.2.9 |
| Cisco | Secure Firewall Threat Defense | 7.2.10 |
| Cisco | Secure Firewall Threat Defense | 7.2.10.2 |
| Cisco | Secure Firewall Threat Defense | 7.3.0 |
| Cisco | Secure Firewall Threat Defense | 7.3.1 |
| Cisco | Secure Firewall Threat Defense | 7.3.1.1 |
| Cisco | Secure Firewall Threat Defense | 7.3.1.2 |
| Cisco | Secure Firewall Threat Defense | 7.4.0 |
| Cisco | Secure Firewall Threat Defense | 7.4.1 |
| Cisco | Secure Firewall Threat Defense | 7.4.1.1 |
| Cisco | Secure Firewall Threat Defense | 7.4.2 |
| Cisco | Secure Firewall Threat Defense | 7.4.2.1 |
| Cisco | Secure Firewall Threat Defense | 7.4.2.2 |
| Cisco | Secure Firewall Threat Defense | 7.4.2.3 |
| Cisco | Secure Firewall Threat Defense | 7.4.2.4 |
| Cisco | Secure Firewall Threat Defense | 7.4.3 |
| Cisco | Secure Firewall Threat Defense | 7.6.0 |
| Cisco | Secure Firewall Threat Defense | 7.6.1 |
| Cisco | Secure Firewall Threat Defense | 7.6.2 |
| Cisco | Secure Firewall Threat Defense | 7.6.2.1 |
| Cisco | Secure Firewall Threat Defense | 7.7.0 |
| Cisco | Secure Firewall Threat Defense | 7.7.10 |
| Cisco | Secure Firewall Threat Defense | 7.7.10.1 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.9.3a |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.9.5a |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.9.6 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.1a |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.2 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.3 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.3a |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.4 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.4a |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.4b |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.5 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 17.12.5a |
Showing 50 of 68 affected configurations. See NVD for the full list.
References
Timeline
- Published
- Last Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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