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TI-2026-71757 Aliases CVE-2026-12655GHSA-2cq9-96mg-hc99

Rockwell 1732E ArmorBlock I/O lets attackers change webserver password

Priority MEDIUM 46CWE-294Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-294.

Summary

Rockwell Automation 1732E ArmorBlock I/O versions from 0 through 3.012 are affected. A capture-replay authentication bypass (CWE-294) lets an unauthenticated remote attacker change the device's webserver password without valid credentials. This can lead to admin account takeover or unauthorized modification of the device configuration.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

A security issue exists within 1732E ArmorBlock® I/O, where an unauthenticated attacker can change the device's webserver password without valid credentials. This could result in admin account takeover or unauthorized modification of device configuration.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th 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
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Rockwell1732E ArmorBlock® I/Oup to 3.012—No fix listedCNA
  • 1732E ArmorBlock® I/O VendorRockwell Affected up to 3.012 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for 1732E ArmorBlock I/O.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-12655
  2. 2026-10-13 Alias added: GHSA-2cq9-96mg-hc99
  3. 2026-10-14 Priority changed: MEDIUM → LOW
  4. 2026-10-16 CISA SSVC decision points changed
  5. 2026-10-16 Priority changed: LOW → MEDIUM

References

Other 1

  • 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