Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Denial of Service Vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20057
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-04 18:16:20 UTC
Updated2026-08-20 15:10:19 UTC
DescriptionMultiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.    This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 unexpectedly restart causing a a denial of service (DoS) condition.

Risk And Classification

Primary CVSS: v3.1 5.8 MEDIUM from [email protected]

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

EPSS: 0.004320000 probability, percentile 0.362290000 (date 2026-08-23)

Problem Types: CWE-369 | CWE-369 Divide By Zero

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
3.1CNACVSSV3_15.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
Low

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Cisco Cyber Vision 3.0.0 All All All
Application Cisco Cyber Vision 3.0.1 All All All
Application Cisco Cyber Vision 3.0.2 All All All
Application Cisco Cyber Vision 3.0.3 All All All
Application Cisco Cyber Vision 3.0.4 All All All
Application Cisco Cyber Vision 3.0.5 All All All
Application Cisco Cyber Vision 3.0.6 All All All
Application Cisco Cyber Vision 3.1.0 All All All
Application Cisco Cyber Vision 3.1.1 All All All
Application Cisco Cyber Vision 3.1.2 All All All
Application Cisco Cyber Vision 3.2.0 All All All
Application Cisco Cyber Vision 3.2.1 All All All
Application Cisco Cyber Vision 3.2.2 All All All
Application Cisco Cyber Vision 3.2.3 All All All
Application Cisco Cyber Vision 3.2.4 All All All
Application Cisco Cyber Vision 4.0.0 All All All
Application Cisco Cyber Vision 4.0.1 All All All
Application Cisco Cyber Vision 4.0.2 All All All
Application Cisco Cyber Vision 4.0.3 All All All
Application Cisco Cyber Vision 4.1.0 All All All
Application Cisco Cyber Vision 4.1.1 All All All
Application Cisco Cyber Vision 4.1.2 All All All
Application Cisco Cyber Vision 4.1.3 All All All
Application Cisco Cyber Vision 4.1.4 All All All
Application Cisco Cyber Vision 4.1.5 All All All
Application Cisco Cyber Vision 4.1.6 All All All
Application Cisco Cyber Vision 4.1.7 All All All
Application Cisco Cyber Vision 4.2.0 All All All
Application Cisco Cyber Vision 4.2.1 All All All
Application Cisco Cyber Vision 4.2.2 All All All
Application Cisco Cyber Vision 4.2.3 All All All
Application Cisco Cyber Vision 4.2.4 All All All
Application Cisco Cyber Vision 4.2.6 All All All
Application Cisco Cyber Vision 4.3.0 All All All
Application Cisco Cyber Vision 4.3.1 All All All
Application Cisco Cyber Vision 4.3.2 All All All
Application Cisco Cyber Vision 4.3.3 All All All
Application Cisco Cyber Vision 4.4.0 All All All
Application Cisco Cyber Vision 4.4.1 All All All
Application Cisco Cyber Vision 4.4.2 All All All
Application Cisco Cyber Vision 4.4.3 All All All
Application Cisco Cyber Vision 5.0.0 All All All
Application Cisco Cyber Vision 5.0.1 All All All
Application Cisco Cyber Vision 5.0.2 All All All
Application Cisco Cyber Vision 5.1.0 All All All
Application Cisco Cyber Vision 5.1.1 All All All
Application Cisco Cyber Vision 5.1.2 All All All
Application Cisco Cyber Vision 5.1.3 All All All
Application Cisco Cyber Vision 5.2.0 All All All
Application Cisco Cyber Vision 5.2.1 All All All
Application Cisco Cyber Vision 5.3.0 All All All
Application Cisco Cyber Vision 5.3.1 All All All
Application Cisco Secure Firewall Threat Defense 7.2.0 All All All
Application Cisco Secure Firewall Threat Defense 7.2.0.1 All All All
Application Cisco Secure Firewall Threat Defense 7.2.1 All All All
Application Cisco Secure Firewall Threat Defense 7.2.10 All All All
Application Cisco Secure Firewall Threat Defense 7.2.10.2 All All All
Application Cisco Secure Firewall Threat Defense 7.2.2 All All All
Application Cisco Secure Firewall Threat Defense 7.2.3 All All All
Application Cisco Secure Firewall Threat Defense 7.2.4 All All All
Application Cisco Secure Firewall Threat Defense 7.2.4.1 All All All
Application Cisco Secure Firewall Threat Defense 7.2.5 All All All
Application Cisco Secure Firewall Threat Defense 7.2.5.1 All All All
Application Cisco Secure Firewall Threat Defense 7.2.5.2 All All All
Application Cisco Secure Firewall Threat Defense 7.2.6 All All All
Application Cisco Secure Firewall Threat Defense 7.2.7 All All All
Application Cisco Secure Firewall Threat Defense 7.2.8 All All All
Application Cisco Secure Firewall Threat Defense 7.2.8.1 All All All
Application Cisco Secure Firewall Threat Defense 7.2.9 All All All
Application Cisco Secure Firewall Threat Defense 7.3.0 All All All
Application Cisco Secure Firewall Threat Defense 7.3.1 All All All
Application Cisco Secure Firewall Threat Defense 7.3.1.1 All All All
Application Cisco Secure Firewall Threat Defense 7.3.1.2 All All All
Application Cisco Secure Firewall Threat Defense 7.4.0 All All All
Application Cisco Secure Firewall Threat Defense 7.4.1 All All All
Application Cisco Secure Firewall Threat Defense 7.4.1.1 All All All
Application Cisco Secure Firewall Threat Defense 7.4.2 All All All
Application Cisco Secure Firewall Threat Defense 7.4.2.1 All All All
Application Cisco Secure Firewall Threat Defense 7.4.2.2 All All All
Application Cisco Secure Firewall Threat Defense 7.4.2.3 All All All
Application Cisco Secure Firewall Threat Defense 7.4.2.4 All All All
Application Cisco Secure Firewall Threat Defense 7.4.3 All All All
Application Cisco Secure Firewall Threat Defense 7.6.0 All All All
Application Cisco Secure Firewall Threat Defense 7.6.1 All All All
Application Cisco Secure Firewall Threat Defense 7.6.2 All All All
Application Cisco Secure Firewall Threat Defense 7.6.2.1 All All All
Application Cisco Secure Firewall Threat Defense 7.7.0 All All All
Application Cisco Secure Firewall Threat Defense 7.7.10 All All All
Application Cisco Secure Firewall Threat Defense 7.7.10.1 All All All
Application Cisco Snort All All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.1a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.2 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.3 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.3a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.4 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.4a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.4b All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.5 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.5a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.5b All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.5c All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.5d All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.6 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.13.1a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.14.1a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.1a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.2a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.2c All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.3 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.3a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.4 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.4c All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.16.1a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.17.1 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.18.1 All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.18.1a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.18.2 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cisco Cisco Cyber Vision affected 3.0.0 Not specified
CNA Cisco Cisco Cyber Vision affected 3.0.2 Not specified
CNA Cisco Cisco Cyber Vision affected 3.0.3 Not specified
CNA Cisco Cisco Cyber Vision affected 3.0.1 Not specified
CNA Cisco Cisco Cyber Vision affected 3.1.0 Not specified
CNA Cisco Cisco Cyber Vision affected 3.0.4 Not specified
CNA Cisco Cisco Cyber Vision affected 3.1.1 Not specified
CNA Cisco Cisco Cyber Vision affected 3.1.2 Not specified
CNA Cisco Cisco Cyber Vision affected 3.2.0 Not specified
CNA Cisco Cisco Cyber Vision affected 3.0.5 Not specified
CNA Cisco Cisco Cyber Vision affected 3.2.1 Not specified
CNA Cisco Cisco Cyber Vision affected 3.0.6 Not specified
CNA Cisco Cisco Cyber Vision affected 3.2.2 Not specified
CNA Cisco Cisco Cyber Vision affected 3.2.3 Not specified
CNA Cisco Cisco Cyber Vision affected 3.2.4 Not specified
CNA Cisco Cisco Cyber Vision affected 4.0.0 Not specified
CNA Cisco Cisco Cyber Vision affected 4.0.1 Not specified
CNA Cisco Cisco Cyber Vision affected 4.0.2 Not specified
CNA Cisco Cisco Cyber Vision affected 4.0.3 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.0 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.1 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.2 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.3 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.4 Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.0 Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.1 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.5 Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.2 Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.X Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.3 Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.4 Not specified
CNA Cisco Cisco Cyber Vision affected 4.2.6 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.6 Not specified
CNA Cisco Cisco Cyber Vision affected 4.3.0 Not specified
CNA Cisco Cisco Cyber Vision affected 4.3.1 Not specified
CNA Cisco Cisco Cyber Vision affected 4.3.2 Not specified
CNA Cisco Cisco Cyber Vision affected 4.3.3 Not specified
CNA Cisco Cisco Cyber Vision affected 4.4.0 Not specified
CNA Cisco Cisco Cyber Vision affected 4.4.1 Not specified
CNA Cisco Cisco Cyber Vision affected 4.4.2 Not specified
CNA Cisco Cisco Cyber Vision affected 4.4.3 Not specified
CNA Cisco Cisco Cyber Vision affected 4.1.7 Not specified
CNA Cisco Cisco Cyber Vision affected 5.0.0 Not specified
CNA Cisco Cisco Cyber Vision affected 5.0.1 Not specified
CNA Cisco Cisco Cyber Vision affected 5.0.2 Not specified
CNA Cisco Cisco Cyber Vision affected 5.1.0 Not specified
CNA Cisco Cisco Cyber Vision affected 5.1.1 Not specified
CNA Cisco Cisco Cyber Vision affected 5.1.2 Not specified
CNA Cisco Cisco Cyber Vision affected 5.1.3 Not specified
CNA Cisco Cisco Cyber Vision affected 5.2.0 Not specified
CNA Cisco Cisco Cyber Vision affected 5.2.1 Not specified
CNA Cisco Cisco Cyber Vision affected 5.3.0 Not specified
CNA Cisco Cisco Cyber Vision affected 5.3.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.0.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.4 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.5 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.4.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.1.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.5.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.6 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.1.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.7 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.5.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.1.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.8 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.8.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.9 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.7.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.10 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.7.10 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.2.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.7.10.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.4 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.10.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.3 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.1a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.2 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.13.1a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.3 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.14.1a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.4 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.3a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.1a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.16.1a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.4a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.2c Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.4b Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.2a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.5 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.17.1 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.5a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.3a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.3 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.5b Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.5c Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.4 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.18.1 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.18.1a Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.6 Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.15.4c Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.12.5d Not specified
CNA Cisco Cisco UTD SNORT IPS Engine Software affected 17.18.2 Not specified

References

ReferenceSourceLinkTags
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-sn... [email protected] sec.cloudapps.cisco.com Vendor Advisory, Mitigation
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Exploits

CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report