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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20058
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-04 18:16:20 UTC
Updated2026-08-20 10:37:34 UTC
DescriptionMultiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities 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 unexpectedly restart, causing a 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: 0.003900000 probability, percentile 0.323610000 (date 2026-08-20)

Problem Types: CWE-786 | CWE-786 Access of Memory Location Before Start of Buffer

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 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
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.9.3a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.9.5a All All All
Operating System Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.9.6 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
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 17.9.3a 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 17.9.5a 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 17.9.6 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 Mitigation, Vendor Advisory
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.

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