CVE-2021-31890

Published: Nov 9, 2021Modified: Jun 17, 2026

9.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploitability: 3.9 / Impact: 5.2

Source: NVD

Description

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), SIMOTICS CONNECT 400 (All versions < V1.0.0.0). The total length of an TCP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on the network buffer organization in memory. (FSMD-2021-0017)

Affected (11)

Products: Siemens: Capital Vstar, Nucleus Net, Nucleus Readystart V3, Nucleus Readystart V4, Nucleus Source Code, Apogee Modular Building Controller Firmware, Apogee Modular Equiment Controller Firmware, Apogee Pxc Compact Firmware, Apogee Pxc Modular Firmware, Talon Tc Compact Firmware, Talon Tc Modular Firmware

Siemens

11 products

Capital Vstar

Nucleus Net

Nucleus Readystart V3

Nucleus Readystart V4

Nucleus Source Code

Apogee Modular Building Controller Firmware

Apogee Modular Equiment Controller Firmware

Apogee Pxc Compact Firmware

Apogee Pxc Modular Firmware

Talon Tc Compact Firmware

Talon Tc Modular Firmware

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Siemens Capital Vstar	All versions
Siemens Nucleus Net	All versions
Siemens Nucleus Readystart V3	Before 2017.02.4
Siemens Nucleus Readystart V4	Before 4.1.1
Siemens Nucleus Source Code	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Siemens Apogee Modular Building Controller Firmware	All versions

Running on/with	Platform Versions
Siemens Apogee Modular Building Controller	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Siemens Apogee Modular Equiment Controller Firmware	All versions

Running on/with	Platform Versions
Siemens Apogee Modular Equiment Controller	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Siemens Apogee Pxc Compact Firmware	All versions

Running on/with	Platform Versions
Siemens Apogee Pxc Compact	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Siemens Apogee Pxc Modular Firmware	All versions

Running on/with	Platform Versions
Siemens Apogee Pxc Modular	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Siemens Talon Tc Compact Firmware	All versions

Running on/with	Platform Versions
Siemens Talon Tc Compact	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Siemens Talon Tc Modular Firmware	All versions

Running on/with	Platform Versions
Siemens Talon Tc Modular	All versions

Related CWEs

CWE-240

Improper Handling of Inconsistent Structural Elements

The product does not handle or incorrectly handles when two or more structural elements should be consistent, but are not.