CVE-2021-27395: siemens simatic process historian 2013 and earlier

Vulnerability summary

CVE-2021-27395 is a high (CVSS 8.1) vulnerability in siemens simatic process historian 2013 and earlier. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.8% of scored vulnerabilities.

Timeline

1. 12-10-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

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.

• CWE-306Missing Authentication for Critical FunctionThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.