CVE-2026-20068
Received Received - Intake
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
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 incomplete error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.
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Meta Information
Published
2026-03-04
Last Modified
2026-03-04
Generated
2026-06-16
AI Q&A
2026-03-04
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20068
EUVD
EUVD-2026-9467
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
cisco snort_3 *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-248 An exception is thrown from a function, but it is not caught.
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Executive Summary

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.

Impact Analysis

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.

Compliance Impact

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Detection Guidance

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