What is CVE-2021-37172?

CVE-2021-37172 is a high-severity vulnerability in Siemens Cpu_1211c, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-08-10.

How severe is CVE-2021-37172?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Siemens Cpu_1211c

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 V13. This could allow an attacker usin…

Vulnerability class: Broken Authentication

EPSS: 0.009 (56.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Siemens Cpu_1211c
Siemens Cpu_1212c
Siemens Cpu_1212fc
Siemens Cpu_1214c
Siemens Cpu_1214fc
Siemens Cpu_1215c
Siemens Cpu_1215fc
Siemens Cpu_1217c
Siemens Simatic S7-1200 Cpu Family (Incl. Siplus Variants) — versions V4.5.0
Siemens Simatic_s7-1200_cpu_firmware — versions 4.5.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

productcert@siemens.com (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-37172?: CVE-2021-37172 is a high-severity vulnerability in Siemens Cpu_1211c, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-08-10.
How severe is CVE-2021-37172?: High severity. CVSS v3 base score is 7.5 out of 10.