CVE-2026-20291

High7.8 Published on Oct 21, 2026

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-2026-20291 are related to issues concerning improper privilege management that are grouped under the Common Weakness Enumeration (CWE) Base CWE-269.

CVSS score7.8 / 10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type (CWE)CWE-269

Vulnerabilities

Cisco fixes 34 flaws, including critical Expressway remote code execution

Cisco issued 14 advisories for 34 CVEs in Expressway, Snort 3, Unified Communications, IOS XR and Secure Client, including critical root execution risk

Oct 22, 202611:48 4 min readRead

This product uses the NVD API but is not endorsed or certified by the NVD.

CVE database

Related articles

Cisco fixes 34 flaws, including critical Expressway remote code execution