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.

Related CVEs

CVE-2018-4850

Key Information

GHSA ID

GHSA-9c5r-829c-7rjc

Published

May 13, 2022 1:32 AM

Last Modified

May 13, 2022 1:32 AM

CVSS Score

7.5 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: July 7, 2025 6:28 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.