CVE-2021-37172

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.19%
Vendor Advisory siemens.com
Affected: Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants)
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-37172?
CVE-2021-37172 has been scored as a high severity vulnerability.
How to fix CVE-2021-37172?
To fix CVE-2021-37172, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-37172 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-37172 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-37172?
CVE-2021-37172 affects Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants).
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