Authentication Vulnerability in Siemens SIMATIC Process Historian
CVE-2021-27395

8.1HIGH

Key Information:

Vendor

Siemens
Status
Simatic Process Historian 2013 And Earlier
Simatic Process Historian 2014
Simatic Process Historian 2019
Simatic Process Historian 2020
Vendor
CVE Published:
12 October 2021

What is CVE-2021-27395?

A significant vulnerability exists in Siemens SIMATIC Process Historian versions, where a critical interface lacks proper authentication. This flaw can be exploited by unauthorized users to inject, alter, or erase vital data, posing a serious risk to the integrity and reliability of data stored in these systems. Organizations utilizing these products should assess their security posture and apply necessary updates to mitigate potential exploitation.

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Affected Version(s)

SIMATIC Process Historian 2013 and earlier All versions

SIMATIC Process Historian 2014 All versions < SP3 Update 6

SIMATIC Process Historian 2019 All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-76624...
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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