CVE-2026-84235— Rockwell Automation 1756-ENBT Denial of Service Vulnerability
Quick assessment
Affected
Rockwell Automation 1756-ENBT Module
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
受影响产品中存在一个拒绝服务（DoS）安全漏洞。该安全漏洞源于恶意构造的 CIP 数据包导致模块崩溃，设备需要重启才能恢复。
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I. Basic Information for CVE-2026-84235
Vulnerability Information
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Vulnerability Title
Rockwell Automation 1756-ENBT Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Rockwell Automation | 1756-ENBT Module | All versions | - |
|
II. Public POCs for CVE-2026-84235
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-84235 (1)
Same Patch Batch · Rockwell Automation · 2026-09-01 · 14 CVEs total
| CVE-2026-9621 | 9.2 CRITICAL | RSLinx Classic® - Multiple Vulnerabilities |
| CVE-2026-9625 | 8.7 HIGH | RSLinx Classic® - Multiple Vulnerabilities |
| CVE-2026-9624 | 8.7 HIGH | RSLinx Classic® - Multiple Vulnerabilities |
| CVE-2026-9622 | 8.7 HIGH | RSLinx Classic® - Multiple Vulnerabilities |
| CVE-2026-9637 | 8.7 HIGH | CompactLogix® 5380 / ControlLogix® 5580 - Multiple Vulnerabilities |
| CVE-2026-19472 | 8.7 HIGH | Rockwell Automation ArmorStart® LT Denial Of Service |
| CVE-2025-12768 | 8.6 HIGH | FactoryTalk® Historian Machine Edition - Out-of-Bounds Write Vulnerability |
| CVE-2026-16675 | 8.5 HIGH | Rockwell Automation FactoryTalk® Activation Manager - Privilege Escalation |
| CVE-2026-9634 | 7.0 HIGH | Redundancy Module Configuration Tool - Multiple Vulnerabilities |
| CVE-2026-9633 | 7.0 HIGH | Redundancy Module Configuration Tool - Multiple Vulnerabilities |
| CVE-2026-12663 | 7.0 HIGH | ControlFLASH ® – Improper Access Control |
| CVE-2026-19471 | 6.9 MEDIUM | Rockwell Automation ArmorStart® LT Stored Cross-site scripting |
| CVE-2026-12661 | 4.8 MEDIUM | FactoryTalk® Historian Machine Edition - Out-of-Bounds Write Vulnerability |
IV. Related Vulnerabilities
Same vendor: Rockwell Automation
-
CVE-2026-9634
Redundancy Module Configuration Tool - Multiple Vulnerabilit -
CVE-2026-9633
Redundancy Module Configuration Tool - Multiple Vulnerabilit -
CVE-2026-12661
FactoryTalk® Historian Machine Edition - Out-of-Bounds Write -
CVE-2025-12768
FactoryTalk® Historian Machine Edition - Out-of-Bounds Write -
CVE-2026-9625
RSLinx Classic® - Multiple Vulnerabilities
V. Comments for CVE-2026-84235
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