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.
Metrics
CVSS 3.1 9.0/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Cyber Vision | 3.0.0; 3.0.2; 3.0.3; 3.0.1; 3.1.0; 3.0.4; 3.1.1; 3.1.2; 3.2.0; 3.0.5; 3.2.1; 3.0.6; 3.2.2; 3.2.3; 3.2.4; 4.0.0; 4.0.1; 4.0.2; 4.0.3; 4.1.0 |
| Cisco | Cisco Open Source Snort3 | 3.12.2.0; 3.1.2.0; 3.1.3.0; 3.1.4.0; 3.1.5.0; 3.1.6.0; 3.1.7.0; 3.1.8.0; 3.1.9.0; 3.1.10.0; 3.1.12.0; 3.1.13.0; 3.1.14.0; 3.1.15.0; 3.1.16.0; 3.1.17.0; 3.1.18.0; 3.1.19.0; 3.1.20.0; 3.1.21.0 |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.0; 7.0.0.1; 7.0.1; 7.0.1.1; 7.0.2; 7.0.2.1; 7.0.3; 7.2.0.1; 7.0.4; 7.2.1; 7.0.5; 7.3.0; 7.2.2; 7.2.3; 7.3.1; 7.2.4; 7.0.6; 7.2.5; 7.2.4.1; 7.3.1.1 |
| Cisco | Cisco UTD SNORT IPS Engine Software | 17.3.1a; 17.3.2; 17.4.1a; 17.5.1; 17.3.3; 17.5.1a; 17.3.4; 17.3.4a; 17.4.2; 17.4.1b; 17.6.1a; 17.7.1a; 17.6.2; 17.8.1a; 17.3.5; 17.6.3; 17.6.3a; 17.7.2; 17.9.1a; 17.6.4 |
References
Timeline
- Published
- Oct 21, 2026
- Last modified
- Nov 7, 2026
- NVD status
- Awaiting Analysis