CVE-2026-20005 (GCVE-0-2026-20005)
Vulnerability from cvelistv5
Published
2026-03-04 17:02
Modified
2026-03-04 18:04
CWE
  • CWE-392 - Missing Report of Error Condition
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.
Impacted products
Vendor Product Version
Cisco Cisco Secure Firewall Threat Defense (FTD) Software Version: 7.6.0
Version: 7.6.1
Version: 7.6.2
Version: 7.6.2.1
Version: 7.7.0
Version: 7.7.10
Version: 7.7.10.1
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   Cisco Cisco Cyber Vision Version: 3.0.4
Version: 3.0.0
Version: 3.0.1
Version: 3.0.2
Version: 3.0.3
Version: 3.0.5
Version: 3.0.6
Version: 3.1.0
Version: 3.1.2
Version: 3.1.1
Version: 3.2.3
Version: 3.2.1
Version: 3.2.4
Version: 3.2.0
Version: 3.2.2
Version: 4.0.0
Version: 4.0.1
Version: 4.0.2
Version: 4.0.3
Version: 4.1.0
Version: 4.1.1
Version: 4.1.2
Version: 4.1.3
Version: 4.1.4
Version: 4.1.5
Version: 4.1.6
Version: 4.1.7
Version: 4.2.0
Version: 4.2.1
Version: 4.2.4
Version: 4.2.6
Version: 4.2.2
Version: 4.2.3
Version: 4.3.0
Version: 4.3.1
Version: 4.3.2
Version: 4.3.3
Version: 4.4.0
Version: 4.4.1
Version: 4.4.2
Version: 4.4.3
Version: 5.0.0
Version: 5.0.1
Version: 5.0.2
Version: 5.1.1
Version: 5.1.2
Version: 5.1.3
Version: 5.2.0
Version: 5.2.1
Version: 5.3.0
Version: 5.3.1
Version: 5.3.2
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   Cisco Cisco UTD SNORT IPS Engine Software Version: 17.2.1r
Version: 17.3.1a
Version: 17.3.2
Version: 17.3.3
Version: 17.3.4a
Version: 17.3.6
Version: 17.3.5
Version: 17.3.7
Version: 17.3.8
Version: 17.4.1a
Version: 17.4.2
Version: 17.4.1b
Version: 17.5.1a
Version: 17.6.1a
Version: 17.6.2
Version: 17.6.3a
Version: 17.6.4
Version: 17.6.5
Version: 17.6.6
Version: 17.6.7
Version: 17.6.8a
Version: 17.7.1a
Version: 17.7.2
Version: 17.10.1a
Version: 17.9.1a
Version: 17.9.2a
Version: 17.9.3a
Version: 17.9.4
Version: 17.9.5a
Version: 17.9.6
Version: 17.9.5e
Version: 17.9.5f
Version: 17.9.7a
Version: 17.9.8
Version: 17.9.7b
Version: 17.8.1a
Version: 17.11.1a
Version: 17.12.1a
Version: 17.12.2
Version: 17.12.3
Version: 17.12.4
Version: 17.12.4a
Version: 17.12.4b
Version: 17.12.5
Version: 17.12.5a
Version: 17.12.5b
Version: 17.12.5c
Version: 17.12.6
Version: 17.12.5d
Version: 17.13.1a
Version: 17.14.1a
Version: 17.15.1a
Version: 17.15.2a
Version: 17.15.2c
Version: 17.15.3
Version: 17.15.3a
Version: 17.15.4
Version: 17.15.4c
Version: 17.16.1a
Version: 17.17.1
Version: 17.18.1a
Version: 17.18.2
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Show details on NVD website


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          "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\r\n\r This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly."
        }
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          "value": "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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            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
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      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-392",
              "description": "Missing Report of Error Condition",
              "lang": "en",
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            }
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        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
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          "name": "cisco-sa-snort3-multi-dos-XFWkWSwz",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz"
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        "advisory": "cisco-sa-snort3-multi-dos-XFWkWSwz",
        "defects": [
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          "CSCwp99280",
          "CSCwo93208"
        ],
        "discovery": "EXTERNAL"
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  "cveMetadata": {
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    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20005",
    "datePublished": "2026-03-04T17:02:45.919Z",
    "dateReserved": "2025-10-08T11:59:15.349Z",
    "dateUpdated": "2026-03-04T18:04:14.731Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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{\"status\": \"affected\", \"version\": \"3.0.5\"}, {\"status\": \"affected\", \"version\": \"3.0.6\"}, {\"status\": \"affected\", \"version\": \"3.1.0\"}, {\"status\": \"affected\", \"version\": \"3.1.2\"}, {\"status\": \"affected\", \"version\": \"3.1.1\"}, {\"status\": \"affected\", \"version\": \"3.2.3\"}, {\"status\": \"affected\", \"version\": \"3.2.1\"}, {\"status\": \"affected\", \"version\": \"3.2.4\"}, {\"status\": \"affected\", \"version\": \"3.2.0\"}, {\"status\": \"affected\", \"version\": \"3.2.2\"}, {\"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\": \"4.1.5\"}, {\"status\": \"affected\", \"version\": \"4.1.6\"}, {\"status\": \"affected\", \"version\": \"4.1.7\"}, {\"status\": \"affected\", \"version\": \"4.2.0\"}, {\"status\": \"affected\", \"version\": \"4.2.1\"}, {\"status\": \"affected\", \"version\": \"4.2.4\"}, {\"status\": \"affected\", \"version\": \"4.2.6\"}, {\"status\": \"affected\", \"version\": \"4.2.2\"}, {\"status\": \"affected\", \"version\": \"4.2.3\"}, {\"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\": \"5.0.0\"}, {\"status\": \"affected\", \"version\": \"5.0.1\"}, {\"status\": \"affected\", \"version\": \"5.0.2\"}, {\"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\"}]}, {\"vendor\": \"Cisco\", \"product\": \"Cisco UTD SNORT IPS Engine Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"17.2.1r\"}, {\"status\": \"affected\", \"version\": \"17.3.1a\"}, {\"status\": \"affected\", \"version\": \"17.3.2\"}, {\"status\": \"affected\", \"version\": \"17.3.3\"}, {\"status\": \"affected\", \"version\": \"17.3.4a\"}, {\"status\": \"affected\", \"version\": \"17.3.6\"}, {\"status\": \"affected\", \"version\": \"17.3.5\"}, {\"status\": \"affected\", \"version\": \"17.3.7\"}, {\"status\": \"affected\", \"version\": \"17.3.8\"}, {\"status\": \"affected\", \"version\": \"17.4.1a\"}, {\"status\": \"affected\", \"version\": \"17.4.2\"}, {\"status\": \"affected\", \"version\": \"17.4.1b\"}, {\"status\": \"affected\", \"version\": \"17.5.1a\"}, {\"status\": \"affected\", \"version\": \"17.6.1a\"}, {\"status\": \"affected\", \"version\": \"17.6.2\"}, {\"status\": \"affected\", \"version\": \"17.6.3a\"}, {\"status\": \"affected\", \"version\": \"17.6.4\"}, {\"status\": \"affected\", \"version\": \"17.6.5\"}, {\"status\": \"affected\", \"version\": \"17.6.6\"}, {\"status\": \"affected\", \"version\": \"17.6.7\"}, {\"status\": \"affected\", \"version\": \"17.6.8a\"}, {\"status\": \"affected\", \"version\": \"17.7.1a\"}, {\"status\": \"affected\", \"version\": \"17.7.2\"}, {\"status\": \"affected\", \"version\": \"17.10.1a\"}, {\"status\": \"affected\", \"version\": \"17.9.1a\"}, {\"status\": \"affected\", \"version\": \"17.9.2a\"}, {\"status\": \"affected\", \"version\": \"17.9.3a\"}, {\"status\": \"affected\", \"version\": \"17.9.4\"}, {\"status\": \"affected\", \"version\": \"17.9.5a\"}, {\"status\": \"affected\", \"version\": \"17.9.6\"}, {\"status\": \"affected\", \"version\": \"17.9.5e\"}, {\"status\": \"affected\", \"version\": \"17.9.5f\"}, {\"status\": \"affected\", \"version\": \"17.9.7a\"}, {\"status\": \"affected\", \"version\": \"17.9.8\"}, {\"status\": \"affected\", \"version\": \"17.9.7b\"}, {\"status\": \"affected\", \"version\": \"17.8.1a\"}, {\"status\": \"affected\", \"version\": \"17.11.1a\"}, {\"status\": \"affected\", \"version\": \"17.12.1a\"}, {\"status\": \"affected\", \"version\": \"17.12.2\"}, {\"status\": \"affected\", \"version\": \"17.12.3\"}, {\"status\": \"affected\", \"version\": \"17.12.4\"}, {\"status\": \"affected\", \"version\": \"17.12.4a\"}, {\"status\": \"affected\", \"version\": \"17.12.4b\"}, {\"status\": \"affected\", \"version\": \"17.12.5\"}, {\"status\": \"affected\", \"version\": \"17.12.5a\"}, {\"status\": \"affected\", \"version\": \"17.12.5b\"}, {\"status\": \"affected\", \"version\": \"17.12.5c\"}, {\"status\": \"affected\", \"version\": \"17.12.6\"}, {\"status\": \"affected\", \"version\": \"17.12.5d\"}, {\"status\": \"affected\", \"version\": \"17.13.1a\"}, {\"status\": \"affected\", \"version\": \"17.14.1a\"}, {\"status\": \"affected\", \"version\": \"17.15.1a\"}, {\"status\": \"affected\", \"version\": \"17.15.2a\"}, {\"status\": \"affected\", \"version\": \"17.15.2c\"}, {\"status\": \"affected\", \"version\": \"17.15.3\"}, {\"status\": \"affected\", \"version\": \"17.15.3a\"}, {\"status\": \"affected\", \"version\": \"17.15.4\"}, {\"status\": \"affected\", \"version\": \"17.15.4c\"}, {\"status\": \"affected\", \"version\": \"17.16.1a\"}, {\"status\": \"affected\", \"version\": \"17.17.1\"}, {\"status\": \"affected\", \"version\": \"17.18.1a\"}, {\"status\": \"affected\", \"version\": \"17.18.2\"}]}], \"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.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz\", \"name\": \"cisco-sa-snort3-multi-dos-XFWkWSwz\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\\r\\n\\r This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-392\", \"description\": \"Missing Report of Error Condition\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-03-04T17:31:57.391Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20005\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T18:04:14.731Z\", \"dateReserved\": \"2025-10-08T11:59:15.349Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-03-04T17:02:45.919Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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