Multiple Cisco Products Snort 3 Multiple DoS (cisco-sa-snort3-multi-dos-XFWkWSwz)

medium Nessus Plugin ID 311446

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, Cisco Secure Firewall Threat Defense (FTD) Software is affected by multiple vulnerabilities.

- Multiple Cisco products are affected by vulnerabilities in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart, resulting in a denial of service (DoS) condition. (CVE-2026-20005, CVE-2026-20065, CVE-2026-20066, CVE-2026-20067, CVE-2026-20068)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwn49805, CSCwn65473, CSCwp99280, CSCwq01529, CSCwq01530, CSCwq23374

Plugin Details

Severity: Medium

ID: 311446

File Name: cisco-sa-snort3-multi-dos-XFWkWSwz-ftd.nasl

Version: 1.1

Type: Combined

Family: CISCO

Published: 5/1/2026

Updated: 5/1/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-20068

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Vulnerability Information

CPE: cpe:/o:cisco:firepower_threat_defense

Required KB Items: installed_sw/Cisco Firepower Threat Defense

Patch Publication Date: 3/4/2026

Vulnerability Publication Date: 3/4/2026

Reference Information

CVE: CVE-2026-20005, CVE-2026-20065, CVE-2026-20066, CVE-2026-20067, CVE-2026-20068

CISCO-SA: cisco-sa-snort3-multi-dos-XFWkWSwz

IAVA: 2026-A-0201

CISCO-BUG-ID: CSCwn49805, CSCwn65473, CSCwp99280, CSCwq01529, CSCwq01530, CSCwq23374

Detections

Analytics