Vulnerability · Published Aug 10, 2021 · Assigned by siemens

CVE-2021-37172

High 7.5

In plain English

A high-severity improper authentication in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)0.9%top 39.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Siemens	SIMATIC S7-1200 CPU family (incl. SIPLUS variants)	V4.5.0

Weakness: CWE-287

References

https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf x_refsource_MISC