AUGUST 5, 2026
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Case File

CVE-2021-27395

HIGH · CVSS 8.1 EPSS 0.78%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-12 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.1. See the original NVD description below for full technical details.

CVE
CVE-2021-27395
Severity
HIGH
CVSS
8.1
EPSS
0.78%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)