Auth bypass in Siemens Simatic Process Historian 2013

CVE-2021-27395

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.

Vulnerability class: Broken Authentication

EPSS: 0.008 (54.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-27395?
CVE-2021-27395 is a high-severity vulnerability in Siemens Simatic Process Historian 2013, classified under Missing Authentication for Critical Function. CVSS score: 8.1/10. Published 2021-10-12.
How severe is CVE-2021-27395?
High severity. CVSS v3 base score is 8.1 out of 10.