Remote Denial of Service Vulnerability in Cisco Snort 3 Detection Engine

CVE-2026-20019

What is CVE-2026-20019?

Cisco's Snort 3 Detection Engine is vulnerable to a Denial of Service attack due to insufficient error checking when processing UDP Netflow Protocol packets. An unauthenticated remote attacker can exploit this vulnerability by sending a carefully crafted Netflow packet. This can cause the Snort 3 Detection Engine to unexpectedly restart, leading to a potential interruption in packet inspection services. The issue emphasizes the need for robust security practices to mitigate risks associated with remote code execution.

References