CVE-2026-20067
Published: Mar 4, 2026
Modified: Mar 4, 2026
CVSS v3.1
5.8
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 the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP 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.
| Vendor | Product | Versions |
|---|---|---|
Cisco | Cisco Cyber Vision | affected 3.0.0affected 3.0.2affected 3.0.3affected 3.0.1affected 3.1.0+49 more versions |
Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | affected 7.0.0affected 7.0.0.1affected 7.0.1affected 7.1.0affected 7.0.1.1+52 more versions |
Cisco | Cisco UTD SNORT IPS Engine Software | affected 17.3.1aaffected 17.2.1raffected 17.3.2affected 17.4.1aaffected 17.5.1+66 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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