Cisco Meraki Multiple Vulnerabilities (cisco-sa-snort3-dcerpc-vulns-J9HNF4tH)

medium Nessus Plugin ID 290254

Synopsis

The remote Cisco Meraki device is potentially missing one or more security-related updates.

Description

According to its self-reported version, the Cisco Meraki device is affected by the following vulnerabilities.:

- A vulnerability in the processing of DCE/RPC requests that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to leak sensitive information or to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in buffer handling logic when processing DCE/RPC requests, which can result in a buffer use-after-free read. An attacker could exploit this vulnerability by sending a large number of DCE/RPC requests through an established connection that is inspected by Snort 3. A successful exploit could allow the attacker to unexpectedly restart the Snort 3 Detection Engine, which could cause a denial of service (DoS). (CVE-2026-20026)

- A vulnerability in the processing of DCE/RPC requests that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to leak sensitive information or to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in buffer handling logic when processing DCE/RPC requests, which can result in a buffer out-of-bounds read. An attacker could exploit this vulnerability by sending a large number of DCE/RPC requests through an established connection that is inspected by Snort 3. A successful exploit could allow the attacker to obtain sensitive information in the Snort 3 data stream. (CVE-2026-20027)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwq75339, CSCwq75359, CSCwr21376, CSCwr21389

Plugin Details

Severity: Medium

ID: 290254

File Name: cisco-sa-snort3-dcerpc-vulns-J9HNF4tH-meraki.nasl

Version: 1.1

Type: remote

Family: CISCO

Published: 1/16/2026

Updated: 1/16/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.9

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:/h:cisco:meraki

Required KB Items: installed_sw/Cisco Meraki, Settings/ParanoidReport

Patch Publication Date: 1/7/2026

Vulnerability Publication Date: 1/7/2026

Reference Information

CVE: CVE-2026-20026, CVE-2026-20027

CWE: 200, 415

CISCO-SA: cisco-sa-snort3-dcerpc-vulns-J9HNF4tH

IAVA: 2026-A-0029

CISCO-BUG-ID: CSCwq75339, CSCwq75359, CSCwr21376, CSCwr21389

Detections

Analytics