CRITICAL 9.0 NVD

CVE-2026-20043

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 c

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.

References

Published: 2026-10-21 · Source: NVD · Feed updated: 2026-10-21
This critical severity vulnerability with a CVSS score of 9.0 was published on 2026-10-21 via NVD.

Risk Timeline

CVE Disclosed2026-10-21 · -1 days ago

Remediation Resources

Official Advisory
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/
vulnfeed aggregates 18720 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.