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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Cyber Vision unknown
Version Status Constraints
3.0.0 affected —
3.0.2 affected —
3.0.3 affected —
3.0.1 affected —
3.1.0 affected —
3.0.4 affected —
3.1.1 affected —
3.1.2 affected —
3.2.0 affected —
3.0.5 affected —
3.2.1 affected —
3.0.6 affected —
3.2.2 affected —
3.2.3 affected —
3.2.4 affected —
4.0.0 affected —
4.0.1 affected —
4.0.2 affected —
4.0.3 affected —
4.1.0 affected —
4.1.1 affected —
4.1.2 affected —
4.1.3 affected —
4.1.4 affected —
4.2.0 affected —
4.2.1 affected —
4.1.5 affected —
4.2.2 affected —
4.2.X affected —
4.2.3 affected —
4.2.4 affected —
4.2.6 affected —
4.1.6 affected —
4.3.0 affected —
4.3.1 affected —
4.3.2 affected —
4.3.3 affected —
4.4.0 affected —
4.4.1 affected —
4.4.2 affected —
4.4.3 affected —
4.1.7 affected —
5.0.0 affected —
5.0.1 affected —
5.0.2 affected —
5.1.0 affected —
5.1.1 affected —
5.1.2 affected —
5.1.3 affected —
5.2.0 affected —
5.2.1 affected —
5.3.0 affected —
5.3.1 affected —
5.3.2 affected —
5.3.3 affected —
5.5.1 affected —
5.6.1 affected —
5.4.0 affected —
5.4.1 affected —
5.4.2 affected —
5.7.0 affected —
5.8.1 affected —
5.7.1 affected —
5.8.0 affected —
5.5.2 affected —
Cisco Cisco Open Source Snort3 unknown
Version Status Constraints
3.12.2.0 affected —
3.1.2.0 affected —
3.1.3.0 affected —
3.1.4.0 affected —
3.1.5.0 affected —
3.1.6.0 affected —
3.1.7.0 affected —
3.1.8.0 affected —
3.1.9.0 affected —
3.1.10.0 affected —
3.1.12.0 affected —
3.1.13.0 affected —
3.1.14.0 affected —
3.1.15.0 affected —
3.1.16.0 affected —
3.1.17.0 affected —
3.1.18.0 affected —
3.1.19.0 affected —
3.1.20.0 affected —
3.1.21.0 affected —
3.1.22.0 affected —
3.1.23.0 affected —
3.1.24.0 affected —
3.1.25.0 affected —
3.1.27.0 affected —
3.1.28.0 affected —
3.1.29.0 affected —
3.1.30.0 affected —
3.1.31.0 affected —
3.1.32.0 affected —
3.1.36.0 affected —
3.1.38.0 affected —
3.1.39.0 affected —
3.1.40.0 affected —
3.1.41.0 affected —
3.1.42.0 affected —
3.1.43.0 affected —
3.1.45.0 affected —
3.1.47.0 affected —
3.1.48.0 affected —
3.1.50.0 affected —
3.1.51.0 affected —
3.1.52.0 affected —
3.1.53.0 affected —
3.1.55.0 affected —
3.1.56.0 affected —
3.1.57.0 affected —
3.1.58.0 affected —
3.1.59.0 affected —
3.1.60.0 affected —
3.1.61.0 affected —
3.1.62.0 affected —
3.1.63.0 affected —
3.1.64.0 affected —
3.1.65.0 affected —
3.1.66.0 affected —
3.1.67.0 affected —
3.1.69.0 affected —
3.1.70.0 affected —
3.1.71.0 affected —
3.1.72.0 affected —
3.1.73.0 affected —
3.1.74.0 affected —
3.1.75.0 affected —
3.1.76.0 affected —
3.1.77.0 affected —
3.1.78.0 affected —
3.1.81.0 affected —
3.1.82.0 affected —
3.1.83.0 affected —
3.1.84.0 affected —
3.2.1.0 affected —
3.2.2.0 affected —
3.3.0.0 affected —
3.3.1.0 affected —
3.3.2.0 affected —
3.3.3.0 affected —
3.3.4.0 affected —
3.3.5.0 affected —
3.3.7.0 affected —
3.5.0.0 affected —
3.5.1.0 affected —
3.8.1.0 affected —
3.6.0.0 affected —
3.6.2.0 affected —
3.9.3.0 affected —
3.7.2.0 affected —
3.7.0.0 affected —
3.9.6.0 affected —
3.10.0.0 affected —
3.10.2.0 affected —
3.7.4.0 affected —
3.9.0.0 affected —
3.5.2.0 affected —
3.12.1.0 affected —
3.6.1.0 affected —
3.9.2.0 affected —
3.6.3.0 affected —
3.9.5.0 affected —
3.7.1.0 affected —
3.9.7.0 affected —
3.7.3.0 affected —
3.10.1.0 affected —
3.9.1.0 affected —
3.11.1.0 affected —
Cisco Cisco Secure Firewall Threat Defense (FTD) Software unknown
Version Status Constraints
7.0.0 affected —
7.0.0.1 affected —
7.0.1 affected —
7.0.1.1 affected —
7.0.2 affected —
7.2.0 affected —
7.0.2.1 affected —
7.0.3 affected —
7.2.0.1 affected —
7.0.4 affected —
7.2.1 affected —
7.0.5 affected —
7.3.0 affected —
7.2.2 affected —
7.2.3 affected —
7.3.1 affected —
7.2.4 affected —
7.0.6 affected —
7.2.5 affected —
7.2.4.1 affected —
7.3.1.1 affected —
7.4.0 affected —
7.0.6.1 affected —
7.2.5.1 affected —
7.4.1 affected —
7.2.6 affected —
7.0.6.2 affected —
7.4.1.1 affected —
7.2.7 affected —
7.2.5.2 affected —
7.3.1.2 affected —
7.2.8 affected —
7.6.0 affected —
7.4.2 affected —
7.2.8.1 affected —
7.0.6.3 affected —
7.4.2.1 affected —
7.2.9 affected —
7.0.7 affected —
7.7.0 affected —
7.4.2.2 affected —
7.2.10 affected —
7.6.1 affected —
7.4.2.3 affected —
7.0.8 affected —
7.6.2 affected —
7.7.10 affected —
7.7.11 affected —
7.0.8.1 affected —
7.6.2.1 affected —
7.7.10.1 affected —
7.4.2.4 affected —
7.2.10.2 affected —
7.4.3 affected —
7.6.4 affected —
10.0.0 affected —
7.4.4 affected —
7.0.9 affected —
7.2.11 affected —
7.4.7 affected —
Cisco Cisco UTD SNORT IPS Engine Software unknown
Version Status Constraints
17.12.1a affected —
17.12.2 affected —
17.13.1a affected —
17.12.3 affected —
17.14.1a affected —
17.12.4 affected —
17.12.3a affected —
17.15.1a affected —
17.16.1a affected —
17.12.4a affected —
17.15.2c affected —
17.12.4b affected —
17.15.2a affected —
17.12.5 affected —
17.17.1 affected —
17.12.5a affected —
17.15.3a affected —
17.15.3 affected —
17.12.5b affected —
17.12.5c affected —
17.15.4 affected —
17.18.1 affected —
17.18.1a affected —
17.12.6 affected —
17.15.4c affected —
17.12.5d affected —
17.18.2 affected —
26.1.1 affected —
17.15.5 affected —
17.15.5a affected —
17.12.7 affected —
17.12.7a affected —
17.12.7b affected —
17.18.3a affected —
17.12.8 affected —
17.15.6 affected —
17.18.4 affected —
26.1.2 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-snort3-ybgmhTQe cve-icon cve-icon
History

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
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-2026-20291 are related to issues concerning improper privilege management that are grouped under the Common Weakness Enumeration (CWE) Base CWE-269.
Title Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
Weaknesses CWE-269
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-21T16:12:53.383Z

Reserved: 2025-10-08T11:59:15.405Z

Link: CVE-2026-20291

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T17:18:28.473

Modified: 2026-10-21T18:54:37.403

Link: CVE-2026-20291

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T20:45:14Z

Weaknesses