Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. 

This vulnerability is due to improper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to enter an infinite loop, causing a DoS condition.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

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 —
Cisco Cisco Secure Firewall Threat Defense (FTD) Software unknown
Version Status Constraints
7.2.0 affected —
7.2.0.1 affected —
7.2.1 affected —
7.3.0 affected —
7.2.2 affected —
7.2.3 affected —
7.3.1 affected —
7.2.4 affected —
7.2.5 affected —
7.2.4.1 affected —
7.3.1.1 affected —
7.4.0 affected —
7.2.5.1 affected —
7.4.1 affected —
7.2.6 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 —
7.4.2.1 affected —
7.2.9 affected —
7.7.0 affected —
7.4.2.2 affected —
7.2.10 affected —
7.6.1 affected —
7.4.2.3 affected —
7.6.2 affected —
7.7.10 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 —
Cisco Cisco UTD SNORT IPS Engine Software unknown
Version Status Constraints
3.17.1S affected —
16.12.3 affected —
Fuji-16.9.5 affected —
16.12.4 affected —
17.3.1a affected —
16.6.6 affected —
16.12.2 affected —
Fuji-16.9.6 affected —
3.17.0S affected —
Fuji-16.9.3 affected —
Denali-16.3.7 affected —
Fuji-16.9.2 affected —
Fuji-16.9.4 affected —
Everest-16.6.4 affected —
Everest-16.6.3 affected —
16.6.5 affected —
Denali-16.3.5 affected —
17.2.1r affected —
17.1.1 affected —
Everest-16.6.2 affected —
16.6.7a affected —
Denali-16.3.4 affected —
16.6.1 affected —
Denali-16.3.9 affected —
Denali-16.3.3 affected —
16.12.1a affected —
17.3.2 affected —
17.4.1a affected —
16.12.5 affected —
17.5.1 affected —
Fuji-16.9.7 affected —
16.6.9 affected —
17.3.3 affected —
17.5.1a affected —
17.3.4 affected —
17.3.4a affected —
17.4.2 affected —
17.4.1b affected —
17.6.1a affected —
16.6.10 affected —
17.7.1a affected —
16.12.6 affected —
Fuji-16.9.8 affected —
17.6.2 affected —
17.8.1a affected —
16.12.7 affected —
17.3.5 affected —
17.6.3 affected —
17.6.3a affected —
17.7.2 affected —
17.9.1a affected —
17.6.4 affected —
17.10.1a affected —
17.3.6 affected —
16.12.8 affected —
17.3.7 affected —
17.9.2a affected —
17.6.5 affected —
17.11.1a affected —
17.9.3a affected —
17.12.1a affected —
17.9.4 affected —
17.6.6 affected —
17.3.8 affected —
17.3.8a affected —
17.6.6a affected —
17.9.4a affected —
17.12.2 affected —
17.13.1a affected —
17.9.5a affected —
17.12.3 affected —
17.6.7 affected —
17.14.1a affected —
17.12.4 affected —
17.12.3a affected —
17.15.1a affected —
17.6.8 affected —
17.9.6 affected —
17.6.8a affected —
17.16.1a affected —
17.9.5e affected —
17.12.4a affected —
17.15.2c affected —
17.9.5f affected —
17.12.4b affected —
17.15.2a affected —
17.12.5 affected —
17.17.1 affected —
17.12.5a affected —
17.9.7a affected —
17.15.3a affected —
17.15.3 affected —
17.12.5b affected —
17.12.5c affected —
17.15.4 affected —
17.9.7b affected —
17.18.1 affected —
17.18.1a affected —
17.12.6 affected —
17.9.8 affected —
17.15.4c affected —
17.12.5d affected —
17.18.2 affected —

No data.

No data.

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-ftd-snort3-vbavuls-96UcVVed cve-icon cve-icon
History

Wed, 04 Mar 2026 18:00:00 +0000

Type Values Removed Values Added
Description Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.  This vulnerability is due to improper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to enter an infinite loop, causing a DoS condition.
Title Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Infinite Loop Denial of Service Vulnerability
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-03-04T17:47:05.854Z

Reserved: 2025-10-08T11:59:15.355Z

Link: CVE-2026-20054

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-04T18:16:19.920

Modified: 2026-03-04T18:16:19.920

Link: CVE-2026-20054

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses