CVE-2021-31883

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

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

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). When processing a DHCP ACK message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0013)

Affected (10)

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

Siemens

10 products

Capital Vstar

Nucleus Net

Nucleus Readystart V3

Nucleus Source Code

Apogee Modular Equiment Controller Firmware

Apogee Pxc Compact Firmware

Apogee Pxc Modular Firmware

Talon Tc Compact Firmware

Talon Tc Modular Firmware

Apogee Modular Building Controller Firmware

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Siemens Capital Vstar	All versions
Siemens Nucleus Net	All versions
Siemens Nucleus Readystart V3	Before 2017.02.1
Siemens Nucleus Source Code	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

Configuration H

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

Related CWEs

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.