TI-2026-57915 Aliases CVE-2026-84235 GHSA-vgg9-hj2v-mg26

Rockwell Automation 1756-ENBT Denial of Service Vulnerability

MEDIUM 44CWE-400Published 2026-09-01 · Updated 2026-09-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00428 37th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Rockwell	1756-ENBT Module	All versions	—	No fix listed	CNA

1756-ENBT Module VendorRockwell Affected All versions Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-84235
2026-10-03 Alias added: GHSA-vgg9-hj2v-mg26

References

Other 1

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1798.html

TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
TI-2021-05574 Insufficiently protected credentials in Rockwell Automation Studio 5000 Logix Designer… KEVCVSS 3.1CRITICAL 9.8
TI-2023-02735 Rockwell Automation ThinManager Thinserver Software Vulnerable to Input Validation Vulnerability CVSS 3.1CRITICAL 9.8
TI-2023-02733 Rockwell Automation ThinManager Thinserver Software Vulnerable to Input Validation Vulnerability CVSS 3.1CRITICAL 9.1
TI-2010-02837 The WDB target agent debug service in Wind River VxWorks 6.x, 5.x, and earlier, as used… CVSS 3.1CRITICAL 9.8
TI-2023-12455 Rockwell Automation ThinManager ThinServer Path Traversal Download CVSS 3.1HIGH 7.5

See all 434 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences