Wago (CVE-2018-8836)

medium Tenable OT Security Plugin ID 500926

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: Medium

ID: 500926

File Name: tenable_ot_wago_CVE-2018-8836.nasl

Version: 1.10

Type: Remote

Family: Tenable.ot

Published: 3/29/2023

Updated: 6/19/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 1.4

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-2018-8836

CVSS v3

Risk Factor: Medium

Base Score: 5.3

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

Vulnerability Information

CPE: cpe:/o:wago:750-829_firmware, cpe:/o:wago:750-852_firmware, cpe:/o:wago:750-880_firmware, cpe:/o:wago:750-831_firmware, cpe:/o:wago:750-889_firmware, cpe:/o:wago:750-885_firmware, cpe:/o:wago:750-882_firmware, cpe:/o:wago:750-881_firmware

Required KB Items: Tenable.ot/Wago

Exploit Ease: No known exploits are available

Patch Publication Date: 4/3/2018

Vulnerability Publication Date: 4/3/2018

Reference Information

CVE: CVE-2018-8836

CWE: 404

ICSA: 18-088-01

Detections

Analytics