Cisco Snort vulnerabilities

13 CVEs affecting Cisco Snort, 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-2021-40116, published 2021-10-27. High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days. Multiple Cisco products are affected by a vulnerability in Snort rules that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.The…
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-2024-20342, published 2024-10-23. High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days. Multiple Cisco products are affected by a vulnerability in the rate filtering feature of the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured rate…
CVE-2025-20359, published 2025-10-15. Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days. Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the disclosure of possible sensitive data or cause…
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…

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,…
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…