CVE-2018-4850

N/A
Published: May 16, 2018 at 05:00 PM UTC
Updated: June 17, 2026 at 01:59 AM UTC
5 products affected across 1 vendorSIMATIC S7-400 FirmwareSIMATIC S7-400h FirmwareSimatic S7-400

Using SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below by Siemens AG?

Get instant alerts when new vulnerabilities affect SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below - before attackers find them.

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Severity
N/A
Exploit prediction
EPSS 2%

Description

A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.

Affected

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

v ≤ 4.0v < 5.2
Affected range stops below 5.2, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-400 (same device)
v ≤ 4.5
siemens-simatic-s7-400h (same device)
All versions

Remediation

No guide yet

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

CVSS

Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20NVD-CWE-noinfo

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