This vulnerability is due to incomplete validation of the SSL certificate. An attacker could exploit this vulnerability by sending a crafted SSL connection setup request to be parsed by Snort 2. A successful exploit could allow the attacker to cause the Snort 2 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | unknown |
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No vendor fix or workaround currently provided.
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Tracking
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Thu, 17 Sep 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Wed, 16 Sep 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 2 Detection Engine to restart. This vulnerability is due to incomplete validation of the SSL certificate. An attacker could exploit this vulnerability by sending a crafted SSL connection setup request to be parsed by Snort 2. A successful exploit could allow the attacker to cause the Snort 2 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition. | |
| Title | Cisco Secure Firewall Threat Defense Software Snort 2 SSL/TLS Denial of Service Vulnerability | |
| Weaknesses | CWE-805 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-09-17T17:29:41.938Z
Reserved: 2025-10-08T11:59:15.405Z
Link: CVE-2026-20290
Vulnrichment
Updated: 2026-09-17T17:25:37.891Z
NVD
Status : Awaiting Analysis
Published: 2026-09-16T21:17:09.610
Modified: 2026-09-18T13:28:28.567
Link: CVE-2026-20290
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-18T01:30:16Z