Vulnerability · Published Oct 12, 2021 · Assigned by siemens

CVE-2021-27395

High 8.1

In plain English

A high-severity missing authentication in SIMATIC Process Historian 2013 and earlier from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS NVD)8.1High

Exploit odds (30 days)0.8%top 43.2% 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 Process Historian 2013 and earlier (All versions), SIMATIC Process Historian 2014 (All versions < SP3 Update 6), SIMATIC Process Historian 2019 (All versions), SIMATIC Process Historian 2020 (All versions). An interface in the software that is used for critical functionalities lacks authentication, which could allow a malicious user to maliciously insert, modify or delete data.

Affected products (as reported)

Vendor	Product	Versions
Siemens	SIMATIC Process Historian 2013 and earlier	All versions
Siemens	SIMATIC Process Historian 2014	All versions < SP3 Update 6
Siemens	SIMATIC Process Historian 2019	All versions
Siemens	SIMATIC Process Historian 2020	All versions

Weakness: CWE-306

References

https://cert-portal.siemens.com/productcert/pdf/ssa-766247.pdf x_refsource_MISC