Medium
Security advisory
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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-20065
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:19 UTC · Revision 1
Source evidence
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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.
osv:CVE-2026-20065
Complete source record
{
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"url": "https://osv.dev/vulnerability/CVE-2026-20065",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2026-20065",
"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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.",
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"modified": "2026-10-24T10:31:05.913253149Z",
"provider": "osv",
"references": [
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],
"vendor_product": "cisco:unified_threat_defense_snort_intrusion_prevention_system_engine",
"extracted_events": [
{
"range": [
{
"introduced": "17.2.1r"
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{
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{
"introduced": "17.3.1a"
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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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{
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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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{
"introduced": "17.3.8a"
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{
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{
"introduced": "17.4.1a"
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{
"last_affected": "17.4.1a"
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{
"introduced": "17.4.1b"
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{
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{
"introduced": "17.4.2"
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{
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{
"introduced": "17.5.1"
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{
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{
"introduced": "17.5.1a"
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{
"last_affected": "17.5.1a"
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{
"introduced": "17.6.1a"
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{
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{
"introduced": "17.6.2"
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{
"last_affected": "17.6.2"
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{
"introduced": "17.6.3"
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{
"last_affected": "17.6.3"
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{
"introduced": "17.6.3a"
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{
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{
"introduced": "17.6.4"
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{
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{
"introduced": "17.6.5"
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{
"last_affected": "17.6.5"
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{
"introduced": "17.6.6"
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{
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{
"introduced": "17.6.6a"
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{
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{
"introduced": "17.6.7"
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{
"last_affected": "17.6.7"
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{
"introduced": "17.6.8"
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{
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{
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{
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{
"introduced": "17.7.1a"
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{
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{
"introduced": "17.7.2"
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{
"last_affected": "17.7.2"
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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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{
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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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{
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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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{
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{
"introduced": "17.12.3"
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{
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{
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{
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{
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{
"introduced": "17.12.4b"
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{
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{
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{
"last_affected": "17.12.5"
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{
"introduced": "17.12.5a"
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{
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{
"introduced": "17.12.5b"
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{
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{
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{
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{
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{
"last_affected": "17.12.5d"
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{
"introduced": "17.12.6"
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{
"last_affected": "17.12.6"
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{
"introduced": "17.13.1a"
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{
"last_affected": "17.13.1a"
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{
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{
"last_affected": "17.14.1a"
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{
"introduced": "17.15.1a"
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{
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{
"introduced": "17.15.2a"
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{
"last_affected": "17.15.2a"
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{
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{
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{
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{
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{
"introduced": "17.15.3a"
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{
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{
"introduced": "17.15.4"
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{
"last_affected": "17.15.4"
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{
"introduced": "17.15.4c"
},
{
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{
"introduced": "17.16.1a"
},
{
"last_affected": "17.16.1a"
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{
"introduced": "17.17.1"
},
{
"last_affected": "17.17.1"
},
{
"introduced": "17.18.1"
},
{
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{
"introduced": "17.18.1a"
},
{
"last_affected": "17.18.1a"
},
{
"introduced": "17.18.2"
},
{
"last_affected": "17.18.2"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2026-20065",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 440876,
"published_at": "2026-03-04T18:16:21.35+00:00"
}