Cisco Unified Threat Defense Snort Intrusion Prevention System Engine vulnerabilities

12 CVEs affecting Cisco Unified Threat Defense Snort Intrusion Prevention System Engine, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-20068, published 2026-03-04.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2022-20685, published 2024-11-15. High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days. A vulnerability in the Modbus preprocessor of the Snort detection engine could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This…
CVE-2026-20005, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.5% chance of exploitation in the next 30 days. 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,…
CVE-2026-20067, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.5% chance of exploitation in the next 30 days. 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,…
CVE-2026-20066, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.5% chance of exploitation in the next 30 days. 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,…
CVE-2026-20057, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days. Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection…
CVE-2026-20054, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days. Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.  This…
CVE-2026-20068, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days. 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,…
CVE-2026-20053, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days. Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This…
CVE-2024-20508, published 2024-09-25. Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days. A vulnerability in Cisco Unified Threat Defense (UTD) Snort Intrusion Prevention System (IPS) Engine for Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass configured…
CVE-2026-20058, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days. 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…

Latest

CVE-2026-20065, published 2026-03-04. Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days. 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,…