CVE-2026-20068
Denial of Service in Cisco Snort 3 via RPC Parsing
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-248 | An exception is thrown from a function, but it is not caught. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects multiple Cisco products that use the Snort 3 detection engine. It arises from incomplete error checking when the engine parses remote procedure call (RPC) data. An unauthenticated, remote attacker can exploit this by sending specially crafted RPC packets through an established connection. This causes the Snort 3 Detection Engine to restart unexpectedly.
The restart interrupts the normal packet inspection process performed by Snort 3.
How can this vulnerability impact me? :
Exploiting this vulnerability can cause a denial of service (DoS) condition by forcing the Snort 3 Detection Engine to restart unexpectedly. This results in an interruption of packet inspection, potentially allowing malicious traffic to go undetected during the downtime.
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?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know