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  4. CVE 2026 84235 rockwell automation 1756 enbt denial of service
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Back to active CVEs
High · CVSS 8.7CVE-2026-84235

Rockwell Automation 1756-ENBT Denial of Service VulnerabilityCVE-2026-84235

Answer in brief

CVE-2026-84235 records a High severity (CVSS 8.7) vulnerability in Rockwell Automation 1756-ENBT Denial of Service Vulnerability. The current sources do not mark it as known exploited. The current feed maps Rockwell Automation/1756-ENBT Module (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 1, 2026Updated Sep 1, 2026Source checked Oct 16, 2026First seen by HOL Sep 1, 2026Material review Sep 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.7. 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.

Affected scope and exposure questions

The current feed maps Rockwell Automation/1756-ENBT Module (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Rockwell Automation/1756-ENBT ModulegenericAll versionsNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Rockwell Automation/1756-ENBT Module.
  2. 2Review the reported fix. Source-reported solution: Upgrade to 1756-EN2T or 1756-EN4TR

Evidence timeline and material changes

  1. Published upstream

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 1, 2026

Sources and claim methodology

  • Source referencerockwellautomation.com
Upstream source description

A denial-of-service security issue exists in the affected product. The security issue stems from a crafted CIP packet being sent crashing the module. The device requires a restart to recover.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • jackson-core: Delayed maxNameLength enforcement for char-backed input (ReaderBasedJsonParser) allows memory-exhaustion denial of serviceAlso CWE-400
  • ZoneMinder: Authenticated OS Command Injection (RCE) via Export FeatureSame generic ecosystem
  • ZoneMinder: Authenticated OS Command Injection via unsanitized Monitor Name in event export (download_functions.php)Same generic ecosystem
  • JavaCV: Integer Overflow in IPCameraFrameGrabber Causes Infinite-Loop DoSSame generic ecosystem
  • IBM i is Affected By An Improper Privilege Management VulnerabilitySame generic ecosystem
  • LoopX serve-status permissive CORS policy exposes control-plane state and private Markdown filesSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-400
Source
CVE List V5
Source checked
Oct 16, 2026
References
1 linked source
Open source record