CVE-2021-37172

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V13 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-287

Affected software

No affected versions have been published.

Timeline

Published
Aug 10, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-37172: High severity, CVSS 7.5 | Vulnix