Cisco Snort vulnerabilities

• cisco open source snort3 Open Source Snort 3 Control Channel Socket Aribitrary Command Execution Vulnerability CVE-2026-76524 7.8 HighOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software +1 more Multiple Cisco Products Snort 3 Generic File Processing Memory Exhaustion Denial of Service Vulnerability CVE-2026-76489 5.8 MediumOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more Multiple Cisco Products Snort 3 Denial of Service Vulnerability CVE-2026-76445 5.3 MediumOctober 21, 2026
• cisco cyber vision, open source snort3, secure firewall threat defense (ftd) software +1 more +3 more Multiple Cisco Products Snort 3 Software Hardening Release: October 2026 CVE-2026-20356 7.5 HighOctober 21, 2026
• cisco cyber vision, open source snort3, secure firewall threat defense (ftd) software +1 more +3 more Multiple Cisco Products Snort 3 Software Hardening Release: October 2026 CVE-2026-20236 7.5 HighOctober 21, 2026
• cisco cyber vision, open source snort3, secure firewall threat defense (ftd) software +1 more +3 more Multiple Cisco Products Snort 3 Software Hardening Release: October 2026 CVE-2026-20291 7.8 HighOctober 21, 2026
• cisco cyber vision, open source snort3, secure firewall threat defense (ftd) software +2 more +4 more Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities CVE-2026-20221 5.8 MediumOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more Multiple Cisco Products Snort 3 Teredo Protocol Denial of Service Vulnerability CVE-2026-20197 5.8 MediumOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more Cisco Secure Firewall Threat Defense Snort 3 Visual Basic for Applications Buffer Overflow Denial of Service Vulnerability CVE-2026-20218 5.8 MediumOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities CVE-2026-20179 5.8 MediumOctober 21, 2026
• cisco cyber vision, open source snort3, secure firewall threat defense (ftd) software +1 more +3 more Multiple Cisco Products Snort 3 Software Hardening Release: October 2026 CVE-2026-20043 9.0 CriticalOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more Multiple Cisco Products Snort 3 Netflow Denial of Service Vulnerabilities CVE-2026-20019 5.8 MediumOctober 21, 2026
• cisco open source snort3, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more Multiple Cisco Products Snort 3 SMTP MIME Denial of Service Vulnerability CVE-2026-20011 5.8 MediumOctober 21, 2026
• cisco snort, cyber vision, secure firewall threat defense (ftd) software +3 more +5 more Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability CVE-2026-20068 5.8 MediumMarch 4, 2026
• cisco snort, cyber vision, secure firewall threat defense (ftd) software +3 more +5 more Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability CVE-2026-20067 5.8 MediumMarch 4, 2026
• cisco snort, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more +4 more Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability CVE-2026-20066 5.8 MediumMarch 4, 2026
• cisco snort, secure firewall threat defense (ftd) software, utd snort ips engine software +2 more +4 more Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability CVE-2026-20065 5.8 MediumMarch 4, 2026
• cisco secure firewall threat defense, snort, secure firewall threat defense (ftd) software +2 more +4 more Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Denial of Service Vulnerability CVE-2026-20058 5.8 MediumMarch 4, 2026
• cisco secure firewall threat defense, snort, cyber vision +3 more +5 more Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Denial of Service Vulnerability CVE-2026-20057 5.8 MediumMarch 4, 2026
• cisco secure firewall threat defense, snort, cyber vision +3 more +5 more Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Infinite Loop Denial of Service Vulnerability CVE-2026-20054 5.8 MediumMarch 4, 2026
• cisco secure firewall threat defense, snort, cyber vision +3 more +5 more Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Heap Overflow Denial of Service Vulnerability CVE-2026-20053 5.8 MediumMarch 4, 2026
• cisco snort, cyber vision, secure firewall threat defense (ftd) software +3 more +5 more Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that... CVE-2026-20005 5.8 MediumMarch 4, 2026
• cisco secure firewall threat defense (ftd) software, utd snort ips engine software +1 more Cisco Snort DCERPC Stub Data Out of Bounds Read CVE-2026-20027 5.3 MediumJanuary 7, 2026
• cisco secure firewall threat defense (ftd) software, utd snort ips engine software +1 more Multiple Cisco Products Snort 3 DCERPC Vulnerabilities CVE-2026-20026 5.8 MediumJanuary 7, 2026
• cisco snort, cyber vision, secure firewall threat defense (ftd) software +1 more +3 more Multiple Cisco Products Snort 3 MIME Information Disclosure or Denial of Service Vulnerability CVE-2025-20359 6.5 MediumOctober 15, 2025
• cisco utd snort ips engine software Multiple Cisco Products SNORT Ethernet Frame Decoder Denial of Service Vulnerability CVE-2021-1285 7.4 HighNovember 18, 2024
• cisco cyber vision, firepower threat defense software, utd snort ips engine software +2 more +4 more Multiple Cisco Products Snort Modbus Denial of Service Vulnerability CVE-2022-20685 7.5 HighNovember 15, 2024
• cisco firepower threat defense software, snort, secure firewall threat defense +2 more Cisco Firepower Threat Defense Software Rate Filter Bypass Vulnerability CVE-2024-20342 5.8 MediumOctober 23, 2024
• cisco utd snort ips engine software, unified threat defense snort intrusion prevention system engine +1 more Cisco UTD Snort IPS Engine Software for Cisco IOS XE Software Security Policy Bypass and Denial of Service Vulnerability CVE-2024-20508 5.8 MediumSeptember 25, 2024
• cisco snort, snort intrusion prevention system, firepower threat defense software +4 more +6 more Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System ... CVE-2024-20363 5.8 MediumMay 22, 2024
• cisco cyber vision, firepower threat defense software, umbrella insights virtual appliance +4 more +6 more Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could... CVE-2023-20071 5.8 MediumNovember 1, 2023
• cisco firepower threat defense software, utd snort ips engine software +1 more Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could... CVE-2021-1494 5.8 MediumFebruary 11, 2023
• cisco snort, firepower threat defense software, secure firewall management center +1 more +3 more Multiple Cisco Products Snort Rule Denial of Service Vulnerability CVE-2021-40116 8.6 HighOctober 27, 2021
• cisco sourcefire snort Cisco Sourcefire Snort 3.0 before build 233 has a Buffer Overread related to use of a decoder... CVE-2017-6658 7.5 HighMay 16, 2017
• cisco snort\+\+ Cisco Sourcefire Snort 3.0 before build 233 mishandles Ether Type Validation. Since valid ether... CVE-2017-6657 7.5 HighMay 16, 2017