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HIGH · 7.5

CVE-2021-37172

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...

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
SiemensSimatic S7-1200 Cpu Firmware4.5.0
SiemensCpu 1211C-
SiemensCpu 1212C-
SiemensCpu 1212Fc-
SiemensCpu 1214C-
SiemensCpu 1214Fc-
SiemensCpu 1215C-
SiemensCpu 1215Fc-
SiemensCpu 1217C-
SiemensSimatic Step 7 \(Tia Portal\)<= 13.0

Related Weaknesses (CWE)

CWE-287

References

FAQ

What is CVE-2021-37172?

CVE-2021-37172 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...

How severe is CVE-2021-37172?

CVE-2021-37172 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-37172?

Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic S7-1200 Cpu Firmware, Siemens Cpu 1211C, Siemens Cpu 1212C, Siemens Cpu 1212Fc, Siemens Cpu 1214C.