CVE-2026-76489
Full vulnerability record from the local CVENow database.
Description
Multiple Cisco products are affected by a vulnerability in the memory management implementation of Snort 3 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 error checking when Snort 3 processes files, which could cause unreleased memory. An attacker could exploit this vulnerability by sending a large number of files to be processed. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.
Severity
MEDIUM
CVSS score
5.8
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-10-21 17:19:08.163000
Last modified
2026-10-22 14:17:47.043000
View original CVE JSON
{
"id": "CVE-2026-76489",
"sourceIdentifier": "[email protected]",
"published": "2026-10-21T17:19:08.163",
"lastModified": "2026-10-22T14:17:47.043",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Multiple Cisco products are affected by a vulnerability in the memory management implementation of Snort 3 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\nThis vulnerability is due to incomplete error checking when Snort 3 processes files, which could cause unreleased memory. An attacker could exploit this vulnerability by sending a large number of files to be processed. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco Open Source Snort3",
"defaultStatus": "unknown",
"versions": [
{
"version": "3.12.2.0",
"status": "affected"
},
{
"version": "3.1.2.0",
"status": "affected"
},
{
"version": "3.1.3.0",
"status": "affected"
},
{
"version": "3.1.4.0",
"status": "affected"
},
{
"version": "3.1.5.0",
"status": "affected"
},
{
"version": "3.1.6.0",
"status": "affected"
},
{
"version": "3.1.7.0",
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},
{
"version": "3.1.8.0",
"status": "affected"
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{
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{
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{
"version": "3.1.12.0",
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{
"version": "3.1.13.0",
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{
"version": "3.1.14.0",
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{
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{
"version": "3.1.16.0",
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},
{
"version": "3.1.17.0",
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{
"version": "3.1.18.0",
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{
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{
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{
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{
"version": "3.1.47.0",
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{
"version": "3.1.48.0",
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"version": "3.1.50.0",
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{
"version": "3.1.51.0",
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"version": "3.1.52.0",
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{
"version": "3.1.53.0",
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{
"version": "3.1.56.0",
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"version": "3.1.57.0",
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"version": "3.1.58.0",
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"version": "3.1.60.0",
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"version": "3.1.62.0",
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"version": "3.1.70.0",
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"version": "3.1.72.0",
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"version": "3.1.74.0",
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"version": "3.1.76.0",
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"version": "3.1.77.0",
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{
"version": "3.1.78.0",
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{
"version": "3.1.81.0",
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{
"version": "3.1.82.0",
"status": "affected"
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{
"version": "3.1.83.0",
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{
"version": "3.1.84.0",
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{
"version": "3.2.1.0",
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{
"version": "3.2.2.0",
"status": "affected"
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{
"version": "3.3.0.0",
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{
"version": "3.3.1.0",
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{
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{
"version": "3.3.3.0",
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{
"version": "3.3.4.0",
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{
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{
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{
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{
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{
"version": "3.8.1.0",
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{
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{
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{
"version": "3.9.3.0",
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{
"version": "3.7.2.0",
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{
"version": "3.7.0.0",
"status": "affected"
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{
"version": "3.9.6.0",
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{
"version": "3.10.0.0",
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{
"version": "3.10.2.0",
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{
"version": "3.7.4.0",
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},
{
"version": "3.9.0.0",
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{
"version": "3.5.2.0",
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{
"version": "3.12.1.0",
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{
"version": "3.6.1.0",
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},
{
"version": "3.9.2.0",
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{
"version": "3.6.3.0",
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{
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{
"version": "3.7.1.0",
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{
"version": "3.9.7.0",
"status": "affected"
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{
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{
"version": "3.10.1.0",
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{
"version": "3.9.1.0",
"status": "affected"
},
{
"version": "3.11.1.0",
"status": "affected"
}
]
},
{
"vendor": "Cisco",
"product": "Cisco Secure Firewall Threat Defense (FTD) Software",
"defaultStatus": "unknown",
"versions": [
{
"version": "7.0.0",
"status": "affected"
},
{
"version": "7.0.0.1",
"status": "affected"
},
{
"version": "7.0.1",
"status": "affected"
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{
"version": "7.0.1.1",
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{
"version": "7.0.2",
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{
"version": "7.2.0",
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{
"version": "7.0.2.1",
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{
"version": "7.0.3",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"version": "7.0.6",
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{
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{
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{
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{
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{
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{
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{
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{
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{
"version": "7.0.6.2",
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{
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{
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{
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{
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{
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{
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{
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{
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{
"version": "7.0.6.3",
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{
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{
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{
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{
"version": "7.7.0",
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{
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{
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{
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{
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{
"version": "7.6.2",
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{
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"status": "affected"
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{
"version": "7.7.11",
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{
"version": "7.0.8.1",
"status": "affected"
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{
"version": "7.6.2.1",
"status": "affected"
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{
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{
"version": "7.4.2.4",
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{
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{
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"status": "affected"
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{
"version": "10.0.0",
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{
"version": "7.4.4",
"status": "affected"
},
{
"version": "7.0.9",
"status": "affected"
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{
"version": "7.4.7",
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}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "LOW"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-21T17:14:49.074914Z",
"id": "CVE-2026-76489",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-misc-dos-6mB22qAK",
"source": "[email protected]"
}
]
}