Improper Authentication in SIMATIC S7-1200 CPU family - CVE-2021-37172

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Main Vulnerability Database Vulnerabilities #VU55773

Improper Authentication in SIMATIC S7-1200 CPU family - CVE-2021-37172

Published: August 11, 2021


Vulnerability identifier: #VU55773
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-37172
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Siemens
Affected software:
SIMATIC S7-1200 CPU family

Detailed vulnerability description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the affected devices fail to authenticate against configured passwords when provisioned using TIA Portal v13. A remote attacker can bypass authentication and download arbitrary programs to the PLC.


How to mitigate CVE-2021-37172

Install updates from vendor's website.

Sources