CVE-2021-40116

CVE-2021-40116 affects Cisco products using Snort3 when a rule with Block with Reset or Interactive Block with Reset is configured without proper constraints. A crafted IP packet can cause a DoS by dropping through traffic; Snort2 configurations are not affected. Connected sources confirm the vul...

CVE-2024-20363

CVE-2024-20363 affects multiple Cisco products due to a vulnerability in the Snort 3 IPS rule engine caused by incorrect HTTP packet handling. An unauthenticated, remote attacker can exploit crafted HTTP traffic to bypass configured IPS rules, allowing uninspected traffic onto the network. Affect...

CVE-2024-20342

CVE-2024-20342 : Multiple Cisco products with Snort rate-filtering can be bypassed due to an incorrect connection count comparison. An unauthenticated, remote attacker can send traffic at or above the configured rate to bypass the rate-limiting filter, potentially allowing unintended traffic into...

CVE-2026-20053

Cisco CVE-2026-20053 affects multiple Cisco products via Snort 3 Visual Basic for Applications (VBA) Decompression Engine. The vulnerability stems from improper range checking when decompressing VBA data, which is user-controlled, enabling an unauthenticated, remote attacker to cause the Snort 3 ...

CVE-2026-20054

Cisco CVE-2026-20054 affects Snort 3 VBA feature. The vulnerability stems from improper error checking when decompressing VBA data, allowing an unauthenticated attacker to send crafted VBA to the Snort 3 Detection Engine and force an infinite loop, resulting in DoS. CVSS‑3.1 metrics: AV:N/AC:L/PR...

CVE-2026-20067

Cisco reports CVE-2026-20067 affects multiple products running the Snort 3 detection engine. The root cause is incomplete error checking when parsing Multicast DNS fields of the HTTP header, exploitable by an unauthenticated, remote attacker sending crafted HTTP packets over the network. Successf...

CVE-2026-20065

Technical details (affected products, components, root cause, impact, remediation) are not publicly provided in the supplied documents. Monitor for updates from Cisco and authoritative advisories to obtain concrete technical information.

CVE-2026-20066

CVE-2026-20066 affects multiple Cisco products using the Snort 3 Detection Engine. The issue stems from JSTokenizer normalization logic during HTTP inspection of JavaScript, allowing an unauthenticated remote attacker to trigger a DoS by causing the Snort 3 engine to restart, interrupting packet ...

CVE-2026-20068

CVE-2026-20068 affects Cisco products using the Snort 3 detection engine. The vulnerability arises from incomplete error checking when parsing remote procedure call (RPC) data, allowing an unauthenticated remote attacker to send crafted RPC packets over an established connection and cause Snort 3...

CVE-2026-20057

CVE-2026-20057 affects multiple Cisco products via the Snort 3 VBA feature. The issue stems from lack of proper error checking when decompressing VBA data, enabling an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash and restart, resulting in a DoS (availability imp...

CVE-2026-20005

Cisco reports that multiple Cisco products using Snort 3 Detection Engine are affected by a vulnerability stemming from incomplete parsing of SSL handshake ingress packets. An unauthenticated, remote attacker can exploit crafted SSL handshake packets to cause the Snort 3 Detection Engine to resta...

CVE-2026-20058

CVE-2026-20058 affects Cisco products featuring the Snort 3 VBA capability. The issue stems from improper error checking when decompressing VBA data in the Snort 3 Detection Engine, which could allow an unauthenticated, remote attacker to send crafted VBA data over the network and cause the Detec...