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5.8
Cisco Products: Snort 3 Restart by Malicious Packets May Disrupt Network
CVE-2026-20065
Summary
Multiple Cisco products contain a vulnerability that can be exploited by sending malicious packets, causing the Snort 3 Detection Engine to restart. This can lead to a network disruption due to interrupted packet inspection. Cisco recommends updating to the latest software versions to mitigate this issue.
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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.
This vulnerability is due to an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.
nvd CVSS3.1
5.8
Vulnerability type
CWE-667
Improper Locking
Published: 4 Mar 2026 · Updated: 13 Mar 2026 · First seen: 6 Mar 2026