CVE-2020-25242

HIGH
7.5
CVSS Score
Published: May 12, 2021 at 01:18 PM UTC
Updated: June 17, 2026 at 03:06 AM UTC
6 products affected across 1 vendorSIMATIC .NET Cp 343-1 Lean FirmwareSIMATIC .NET Cp 343-1 Advanced FirmwareSIMATIC .NET Cp 343-1 Standard Firmware

Using SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) by Siemens?

Get instant alerts when new vulnerabilities affect SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

A vulnerability has been identified in SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions). Specially crafted packets sent to TCP port 102 could cause a Denial-of-Service condition on the affected devices. A cold restart might be necessary in order to recover.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
siemens-simatic-net-cp-343-1-advanced (same device)
All versions
siemens-simatic-net-cp-343-1-lean (same device)
All versions
siemens-simatic-net-cp-343-1-standard (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMx_refsource_MISCVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf
x_refsource_MISCThird Party AdvisoryUS Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-07

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card