Answer in brief
CVE-2026-12661 records a Unknown severity vulnerability in FactoryTalk® Historian Machine Edition - Out-of-Bounds Write Vulnerability. The current sources do not mark it as known exploited. The current feed maps Rockwell Automation/FactoryTalk® Historian Machine Edition (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Rockwell Automation/FactoryTalk® Historian Machine Edition (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Rockwell Automation/FactoryTalk® Historian Machine Editiongeneric | Series C: 7.101 Series B: 5.202 | Not reported |
Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 1, 2026
A denial-of-service security issue exists within FactoryTalk® Historian Machine Edition. A network adjacent attacker who is authenticated could send crafted requests to the web interface, resulting in buffer overflow conditions that may cause the device to crash and become unresponsive.
Quoted source text, attributed separately from HOL analysis.