Vulnerability · Published Sep 14, 2021 · Assigned by siemens

CVE-2021-37206

High 7.5

In plain English

A high-severity improper input validation in SIPROTEC 5 relays with CPU variants CP050 from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.4%top 26.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Received webpackets are not properly processed. An unauthenticated remote attacker with access to any of the Ethernet interfaces could send specially crafted packets to force a restart of the target device.

Affected products (as reported)

Vendor	Product	Versions
Siemens	SIPROTEC 5 relays with CPU variants CP050	All versions < V8.80
Siemens	SIPROTEC 5 relays with CPU variants CP100	All versions < V8.80
Siemens	SIPROTEC 5 relays with CPU variants CP300	All versions < V8.80

Weakness: CWE-20

References

https://cert-portal.siemens.com/productcert/pdf/ssa-500748.pdf x_refsource_MISC