Siemens SCALANCE Improper Input Validation (CVE-2020-26145)

medium Tenable OT Security Plugin ID 505319

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration.

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: 505319

File Name: tenable_ot_siemens_CVE-2020-26145.nasl

Version: 1.4

Type: Remote

Family: Tenable.ot

Published: 4/14/2026

Updated: 4/21/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

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

CVSS Score Source: CVE-2020-26145

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:scalance_wam766-1_firmware:1.2.0, cpe:/o:siemens:scalance_wam766-1_%28us%29_firmware:1.2.0, cpe:/o:siemens:scalance_wam766-1_eec_%28us%29_firmware:1.2.0, cpe:/o:siemens:scalance_wum766-1_%28usa%29_firmware:1.2.0, cpe:/o:siemens:scalance_wum763-1_firmware:1.2.0, cpe:/o:siemens:scalance_wum766-1_firmware:1.2.0, cpe:/o:siemens:scalance_wam763-1_firmware:1.2.0, cpe:/o:siemens:scalance_wam766-1_eec_firmware:1.2.0

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 5/11/2021

Vulnerability Publication Date: 5/11/2021

Reference Information

CVE: CVE-2020-26145

CWE: 20

ICSA: 22-104-04

Detections

Analytics