CVE-2021-27395

HIGH
8.1
CVSS Score
Published: October 12, 2021 at 09:49 AM UTC
Updated: June 17, 2026 at 03:44 AM UTC
4 products affected across 1 vendorSIMATIC Process Historian 2020SIMATIC Process Historian 2013SIMATIC Process Historian 2019

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Severity
HIGH8.1
Exploit prediction
EPSS 0.8%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-306

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