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// CVE · PUBLISHED 2026-10-21

CVE-2026-20043

Cisco / Cisco Cyber Vision · Cisco / Cisco Open Source Snort3 · Cisco / Cisco Secure Firewall Threat Defense (FTD) Software · +1

9.0 · CVSS 3.1Critical

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.

References

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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.