Recommended action window: Monitor and triage in normal cycle
NVD description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20043 are related to issues concerning out-of-bounds writes that are grouped under the Common Weakness Enumeration (CWE) Base CWE-787.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Cisco fixes 13 Snort 3 vulnerabilities, including CVE-2026-20043 and denial of service flaws affecting FTD, Meraki MX and IOS XE. #Snort3 #Cisco #CVE202620043 #CVE202620291 #CVE202676524 #DenialOfService #FirewallSecurity #CyberSecurity https://securityonline.info/cisco-snort-3-vulnerabilities-october-2026/
⚠️ A severe vulnerability was disclosed for Cisco Cyber Vision and other products (CVE-2026-20043) vuldb.com/vuln/424878 https://t.co/bGrDvBoMvw