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5.8
Cisco Products: Remote Restart of Snort 3 Detection Engine
CVE-2026-20068
Summary
Some Cisco products that use the Snort 3 detection engine may be vulnerable to a remote attack that can cause the engine to restart, disrupting network traffic inspection. This could lead to a denial-of-service (DoS) condition. Cisco recommends updating the software to a fixed version to prevent this vulnerability.
Original title
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, result...
Original 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.
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.
nvd CVSS3.1
5.8
Vulnerability type
CWE-248
Published: 4 Mar 2026 · Updated: 13 Mar 2026 · First seen: 6 Mar 2026