CVE-2021-37172
Siemens · published 2021-08-10
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
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.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC S7-1200 CPU family (incl. SIPLUS variants) | V4.5.0: affected |
Products named in NVD's CPE match criteria (2)
cpe:2.3:o:siemens:simatic_s7-1200_cpu_firmware:4.5.0:*:*:*:*:*:*:*cpe:2.3:a:siemens:simatic_step_7_\(tia_portal\):*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 7.5 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0: 5 MEDIUM — as published by NIST (Primary)
AV:N/AC:L/Au:N/C:N/I:P/A:N
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf
Source dates: published 2021-08-10, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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