CVE-2026-20065
Denial of Service in Cisco Snort 3 Detection Engine
Publication date: 2026-03-04
Last updated on: 2026-03-04
Assigner: Cisco Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | snort_3 | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-667 | The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
The primary impact of this vulnerability is a denial of service (DoS) condition. When exploited, the Snort 3 Detection Engine restarts unexpectedly, causing an interruption in packet inspection.
This interruption could allow malicious traffic to pass undetected during the downtime, potentially compromising network security.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
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What immediate steps should I take to mitigate this vulnerability?
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Can you explain this vulnerability to me?
This vulnerability affects multiple Cisco products that use the Snort 3 Detection Engine. It is caused by an error in the binder module initialization logic within Snort 3. An unauthenticated, remote attacker can exploit this by sending specially crafted packets through an established connection that Snort 3 parses. Exploiting this vulnerability causes the Snort 3 Detection Engine to restart unexpectedly.
The unexpected restart results in an interruption of packet inspection by Snort 3.