Improper Authentication in SIMATIC S7-1200 CPU family - CVE-2021-37172
Published: August 11, 2021
Vulnerability identifier: #VU55773
CSH Severity: High
CVSS v4: 9.2 [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]
CVE-ID: CVE-2021-37172
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
SIMATIC S7-1200 CPU family
How to mitigate CVE-2021-37172
Install updates from vendor's website.
SIMATIC S7-1200 CPU family - update to 4.5.1