Siemens SIMATIC Process Historian OPC UA Server

Name: Siemens SIMATIC Process Historian OPC UA Server
Brand: Siemens

productDE

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

KEV-listed

critical

by severity

0critical3high1medium0low

updated 2026-10-28

vulnerabilities (4)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2022-0778US	high7.5	73.2% (99th)	Exploit	V2020_SP1_Update_1	2022-03-15	< V2020_SP1_Update_1
CVE-2021-3449US	medium5.9	63.5% (99th)	Exploit	no fix	2021-03-25	≤ All versions >= 2019 < 2020 Upd1
CVE-2021-3712US	high7.4	50.4% (99th)	Exploit	V2020_SP1	2021-08-24	2 versions
CVE-2021-40142US	high7.5	2.56% (85th)	—	V2020_SP1	2021-08-27	2 versions

The flaw types (CWEs) most of these CVEs share.

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer1 CVEs
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')1 CVEs
CWE-125Out-of-bounds Read1 CVEs
CWE-1357Reliance on Insufficiently Trustworthy Component1 CVEs
CWE-476NULL Pointer Dereference1 CVEs
CWE-788Access of Memory Location After End of Buffer1 CVEs
CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')1 CVEs

Which sources assert this record, and when.

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