CVE-2026-20043

CVE Enrichment

CVSS: 9.0 CRITICAL
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 22-Oct-2026 00:18
Last Modified: 22-Oct-2026 21:17
CWE: CWE-787

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:H /
                            PR:N /
                            UI:N /
                            S:C /
                            C:H /
                            I:H /
                            A:H

References

[email protected]

Last enrichment sync: 22-Oct-2026 21:28
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

Multiple Cisco products received patches for 13 CVEs affecting Snort 3, including CVE-2026-20236 and CVE-2026-20043, which group critical-severity incorrect calculation and out-of-bounds write issues. Cisco Patches 34 Vulnerabilities Across Multiple Products

CVE (7)

Vendors (1)

Products (18)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.