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CVE-2021-40142

nvd nist
Published: Aug 27, 2021Modified: Jun 17, 2026

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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

In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.

Affected (11)

Opcfoundation
1 product
Local Discover Server
Siemens
6 products
Simatic Process Historian Opc Ua Server Firmware
Simatic Net Pc
Simatic Wincc
Simatic Wincc Runtime
Simatic Wincc Unified Scada Runtime
Telecontrol Server Basic
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Local Discover Server
Before 1.04.402.463
Configuration B
2 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Siemens
Simatic Process Historian Opc Ua Server Firmware
Before 2022
Simatic Process Historian Opc Ua Server Firmware
Version 2022
Running on/withPlatform Versions
Siemens
Simatic Process Historian Opc Ua Server
All versions
Configuration C
8 vulnerable
Vulnerable SoftwareAffected Versions
Siemens
Simatic Net Pc
Version 14
Simatic Net Pc
Version 15
Simatic Net Pc
Version 16
Simatic Net Pc
Version 17
Simatic Wincc
All versions
Simatic Wincc Runtime
All versions
Simatic Wincc Unified Scada Runtime
All versions
Telecontrol Server Basic
Version 3.0

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.

References (6)

Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
PatchVendor Advisory
Source: cve@mitre.org
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.