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 parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.
Affected products
cisco: cyber vision; cisco: secure firewall threat defense; cisco: unified threat defense snort intrusion prevention system engine; cisco: snort; cisco: meraki mx100; cisco: meraki mx105; cisco: meraki mx250; cisco: meraki mx400; cisco: meraki mx450; cisco: meraki mx600; cisco: meraki mx64; cisco: meraki mx64w; cisco: meraki mx65; cisco: meraki mx65w; cisco: meraki mx67
References1
- sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAd… Vendor Advisory
Metrics
- CVSS 3.1
-
5.8
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L - EPSS — exploit probability
- 1% percentile: 47 · as of 12 November 2026
- CWE
- CWE-392
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