Cisco Snort 3 SMTP MIME Decoder flaw (CVE-2026-20011) enables remote DoS via Detection Engine restart
Cisco disclosed CVE-2026-20011, a medium-severity vulnerability in the Snort 3 SMTP MIME Decoder affecting multiple Cisco products. An unauthenticated, remote attacker can cause the Snort 3 Detection Engine to restart, producing a denial-of-service condition. Cisco has released software updates, and no workarounds exist. The advisory is p…