FKIE_CVE-2026-20057
Vulnerability from fkie_nvd - Published: 2026-03-04 18:16 - Updated: 2026-08-20 15:10
Severity
Summary
Multiple 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.
References
| URL | Tags | ||
|---|---|---|---|
| psirt@cisco.com | https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed | Vendor Advisory, Mitigation |
Impacted products
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"source": "psirt@cisco.com"
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{
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"value": "Multiple 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.\u0026nbsp;\r\n\u0026nbsp;\r\nThis 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."
},
{
"lang": "es",
"value": "M\u00faltiples productos Cisco se ven afectados por una vulnerabilidad en la caracter\u00edstica de Visual Basic para Aplicaciones (VBA) de Snort 3 que podr\u00eda permitir a un atacante remoto no autenticado causar la ca\u00edda del motor de detecci\u00f3n de Snort 3.\n\nEsta vulnerabilidad se debe a la falta de una comprobaci\u00f3n de errores adecuada al descomprimir datos VBA. Un atacante podr\u00eda explotar esta vulnerabilidad enviando datos VBA manipulados al motor de detecci\u00f3n de Snort 3 en el dispositivo objetivo. Un exploit exitoso podr\u00eda permitir al atacante causar que el motor de detecci\u00f3n de Snort 3 se reinicie inesperadamente, provocando una condici\u00f3n de denegaci\u00f3n de servicio (DoS)."
}
],
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"lastModified": "2026-08-20T15:10:19.563",
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{
"cvssData": {
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"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
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}
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"options": [
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},
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},
{
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}
],
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"timestamp": "2026-03-04T21:32:36.004303Z",
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}
}
]
},
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"source": "psirt@cisco.com",
"tags": [
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"Mitigation"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed"
}
],
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{
"description": [
{
"lang": "en",
"value": "CWE-369"
}
],
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}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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