Vulnerability-Lookup

GHSA-6WJ9-H5WQ-GM77

Vulnerability from github – Published: 2026-03-04 18:31 – Updated: 2026-03-04 18:31

Details

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 range checking when decompressing VBA data, which is user controlled. 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 an overflow of heap data, which could cause a DoS condition.

Severity

5.8 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-20053"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-04T18:16:19Z",
    "severity": "MODERATE"
  },
  "details": "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.\n\nThis vulnerability is due to improper range checking when decompressing VBA data, which is user controlled. 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 an overflow of heap data, which could cause a DoS condition.",
  "id": "GHSA-6wj9-h5wq-gm77",
  "modified": "2026-03-04T18:31:55Z",
  "published": "2026-03-04T18:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20053"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-20053 (GCVE-0-2026-20053)

Vulnerability from cvelistv5 – Published: 2026-03-04 17:46 – Updated: 2026-03-04 21:25

Title

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

Summary

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 range checking when decompressing VBA data, which is user controlled. 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 an overflow of heap data, which could cause a DoS condition.

Severity

5.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-04 21:24 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

3 products

Vendor	Product	Version
Cisco	Cisco Cyber Vision	Affected: 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
Cisco	Cisco Secure Firewall Threat Defense (FTD) Software	Affected: 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
Cisco	Cisco UTD SNORT IPS Engine Software	Affected: 17.12.1a Affected: 17.9.4 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: 17.9.5e 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

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20053",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-04T21:24:52.682489Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-04T21:25:01.489Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Cyber Vision",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "3.0.0"
            },
            {
              "status": "affected",
              "version": "3.0.2"
            },
            {
              "status": "affected",
              "version": "3.0.3"
            },
            {
              "status": "affected",
              "version": "3.0.1"
            },
            {
              "status": "affected",
              "version": "3.1.0"
            },
            {
              "status": "affected",
              "version": "3.0.4"
            },
            {
              "status": "affected",
              "version": "3.1.1"
            },
            {
              "status": "affected",
              "version": "3.1.2"
            },
            {
              "status": "affected",
              "version": "3.2.0"
            },
            {
              "status": "affected",
              "version": "3.0.5"
            },
            {
              "status": "affected",
              "version": "3.2.1"
            },
            {
              "status": "affected",
              "version": "3.0.6"
            },
            {
              "status": "affected",
              "version": "3.2.2"
            },
            {
              "status": "affected",
              "version": "3.2.3"
            },
            {
              "status": "affected",
              "version": "3.2.4"
            },
            {
              "status": "affected",
              "version": "4.0.0"
            },
            {
              "status": "affected",
              "version": "4.0.1"
            },
            {
              "status": "affected",
              "version": "4.0.2"
            },
            {
              "status": "affected",
              "version": "4.0.3"
            },
            {
              "status": "affected",
              "version": "4.1.0"
            },
            {
              "status": "affected",
              "version": "4.1.1"
            },
            {
              "status": "affected",
              "version": "4.1.2"
            },
            {
              "status": "affected",
              "version": "4.1.3"
            },
            {
              "status": "affected",
              "version": "4.1.4"
            },
            {
              "status": "affected",
              "version": "4.2.0"
            },
            {
              "status": "affected",
              "version": "4.2.1"
            },
            {
              "status": "affected",
              "version": "4.1.5"
            },
            {
              "status": "affected",
              "version": "4.2.2"
            },
            {
              "status": "affected",
              "version": "4.2.X"
            },
            {
              "status": "affected",
              "version": "4.2.3"
            },
            {
              "status": "affected",
              "version": "4.2.4"
            },
            {
              "status": "affected",
              "version": "4.2.6"
            },
            {
              "status": "affected",
              "version": "4.1.6"
            },
            {
              "status": "affected",
              "version": "4.3.0"
            },
            {
              "status": "affected",
              "version": "4.3.1"
            },
            {
              "status": "affected",
              "version": "4.3.2"
            },
            {
              "status": "affected",
              "version": "4.3.3"
            },
            {
              "status": "affected",
              "version": "4.4.0"
            },
            {
              "status": "affected",
              "version": "4.4.1"
            },
            {
              "status": "affected",
              "version": "4.4.2"
            },
            {
              "status": "affected",
              "version": "4.4.3"
            },
            {
              "status": "affected",
              "version": "4.1.7"
            },
            {
              "status": "affected",
              "version": "5.0.0"
            },
            {
              "status": "affected",
              "version": "5.0.1"
            },
            {
              "status": "affected",
              "version": "5.0.2"
            },
            {
              "status": "affected",
              "version": "5.1.0"
            },
            {
              "status": "affected",
              "version": "5.1.1"
            },
            {
              "status": "affected",
              "version": "5.1.2"
            },
            {
              "status": "affected",
              "version": "5.1.3"
            },
            {
              "status": "affected",
              "version": "5.2.0"
            },
            {
              "status": "affected",
              "version": "5.2.1"
            },
            {
              "status": "affected",
              "version": "5.3.0"
            },
            {
              "status": "affected",
              "version": "5.3.1"
            },
            {
              "status": "affected",
              "version": "5.3.2"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "7.2.0"
            },
            {
              "status": "affected",
              "version": "7.2.0.1"
            },
            {
              "status": "affected",
              "version": "7.2.1"
            },
            {
              "status": "affected",
              "version": "7.3.0"
            },
            {
              "status": "affected",
              "version": "7.2.2"
            },
            {
              "status": "affected",
              "version": "7.2.3"
            },
            {
              "status": "affected",
              "version": "7.3.1"
            },
            {
              "status": "affected",
              "version": "7.2.4"
            },
            {
              "status": "affected",
              "version": "7.2.5"
            },
            {
              "status": "affected",
              "version": "7.2.4.1"
            },
            {
              "status": "affected",
              "version": "7.3.1.1"
            },
            {
              "status": "affected",
              "version": "7.4.0"
            },
            {
              "status": "affected",
              "version": "7.2.5.1"
            },
            {
              "status": "affected",
              "version": "7.4.1"
            },
            {
              "status": "affected",
              "version": "7.2.6"
            },
            {
              "status": "affected",
              "version": "7.4.1.1"
            },
            {
              "status": "affected",
              "version": "7.2.7"
            },
            {
              "status": "affected",
              "version": "7.2.5.2"
            },
            {
              "status": "affected",
              "version": "7.3.1.2"
            },
            {
              "status": "affected",
              "version": "7.2.8"
            },
            {
              "status": "affected",
              "version": "7.6.0"
            },
            {
              "status": "affected",
              "version": "7.4.2"
            },
            {
              "status": "affected",
              "version": "7.2.8.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.1"
            },
            {
              "status": "affected",
              "version": "7.2.9"
            },
            {
              "status": "affected",
              "version": "7.7.0"
            },
            {
              "status": "affected",
              "version": "7.4.2.2"
            },
            {
              "status": "affected",
              "version": "7.2.10"
            },
            {
              "status": "affected",
              "version": "7.6.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.3"
            },
            {
              "status": "affected",
              "version": "7.6.2"
            },
            {
              "status": "affected",
              "version": "7.7.10"
            },
            {
              "status": "affected",
              "version": "7.6.2.1"
            },
            {
              "status": "affected",
              "version": "7.7.10.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.4"
            },
            {
              "status": "affected",
              "version": "7.2.10.2"
            },
            {
              "status": "affected",
              "version": "7.4.3"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Cisco UTD SNORT IPS Engine Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.12.1a"
            },
            {
              "status": "affected",
              "version": "17.9.4"
            },
            {
              "status": "affected",
              "version": "17.12.2"
            },
            {
              "status": "affected",
              "version": "17.13.1a"
            },
            {
              "status": "affected",
              "version": "17.12.3"
            },
            {
              "status": "affected",
              "version": "17.14.1a"
            },
            {
              "status": "affected",
              "version": "17.12.4"
            },
            {
              "status": "affected",
              "version": "17.12.3a"
            },
            {
              "status": "affected",
              "version": "17.15.1a"
            },
            {
              "status": "affected",
              "version": "17.16.1a"
            },
            {
              "status": "affected",
              "version": "17.9.5e"
            },
            {
              "status": "affected",
              "version": "17.12.4a"
            },
            {
              "status": "affected",
              "version": "17.15.2c"
            },
            {
              "status": "affected",
              "version": "17.12.4b"
            },
            {
              "status": "affected",
              "version": "17.15.2a"
            },
            {
              "status": "affected",
              "version": "17.12.5"
            },
            {
              "status": "affected",
              "version": "17.17.1"
            },
            {
              "status": "affected",
              "version": "17.12.5a"
            },
            {
              "status": "affected",
              "version": "17.15.3a"
            },
            {
              "status": "affected",
              "version": "17.15.3"
            },
            {
              "status": "affected",
              "version": "17.12.5b"
            },
            {
              "status": "affected",
              "version": "17.12.5c"
            },
            {
              "status": "affected",
              "version": "17.15.4"
            },
            {
              "status": "affected",
              "version": "17.18.1"
            },
            {
              "status": "affected",
              "version": "17.18.1a"
            },
            {
              "status": "affected",
              "version": "17.12.6"
            },
            {
              "status": "affected",
              "version": "17.15.4c"
            },
            {
              "status": "affected",
              "version": "17.12.5d"
            },
            {
              "status": "affected",
              "version": "17.18.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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.\r\n\r\nThis vulnerability is due to improper range checking when decompressing VBA data, which is user controlled. 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 an overflow of heap data, which could cause a DoS condition."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "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"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "Heap-based Buffer Overflow",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-04T17:46:58.213Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-ftd-snort3-vbavuls-96UcVVed",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed"
        }
      ],
      "source": {
        "advisory": "cisco-sa-ftd-snort3-vbavuls-96UcVVed",
        "defects": [
          "CSCwq23373"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Heap Overflow Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20053",
    "datePublished": "2026-03-04T17:46:58.213Z",
    "dateReserved": "2025-10-08T11:59:15.355Z",
    "dateUpdated": "2026-03-04T21:25:01.489Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

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.