Rockwell Automation Logix Platform: 1 CVE, High 7.5
Summary
CISA reports 1 vulnerability in Rockwell Automation ControlLogix 5580, CompactLogix 5380, GuardLogix 5580, Compact GuardLogix 5380. Weakness type: Improper Restriction of Operations within the Bounds of a Memory Buffer. Successful exploitation of this vulnerability could result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover. Highest CVSS v3 score: 7.5 (High), exploitable over the network.
At a glance
- Vendor
- Rockwell Automation
- Products
- ControlLogix 5580, CompactLogix 5380, GuardLogix 5580, Compact GuardLogix 5380
- CVEs
- CVE-2026-9637
- Highest CVSS v3
- 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Highest CVSS v4
- –
- Known exploited (KEV)
- No CVE from this advisory is on the KEV list as of the last refresh
- Sectors (per CISA)
- Critical Manufacturing
- Deployed
- Worldwide
- Vendor HQ
- United States
Vulnerabilities
| CVE | Weakness | CVSS v3 | CVSS v4 | KEV | Description (from advisory) |
|---|---|---|---|---|---|
| CVE-2026-9637 | Improper Restriction of Operations within the Bounds of a Memory Buffer | 7.5 | – | No | A denial-of-service vulnerability exists in the affected Logix platforms due to improper validation of input length during CIP message processing. This can result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover. |
Affected products (16)
- Rockwell Automation ControlLogix 5580 <=V33
- Rockwell Automation ControlLogix 5580 V34.011-V34.014
- Rockwell Automation ControlLogix 5580 V35.011-V35.013
- Rockwell Automation ControlLogix 5580 V36.011-V36.012
- Rockwell Automation CompactLogix 5380 <=V33
- Rockwell Automation CompactLogix 5380 V34.011-V34.014
- Rockwell Automation CompactLogix 5380 V35.011-V35.013
- Rockwell Automation CompactLogix 5380 V36.011-V36.012
- Rockwell Automation GuardLogix 5580 <=V33
- Rockwell Automation GuardLogix 5580 V34.011-V34.014
- Rockwell Automation GuardLogix 5580 V35.011-V35.013
- Rockwell Automation GuardLogix 5580 V36.011-V36.012
- Rockwell Automation Compact GuardLogix 5380 <=V33
- Rockwell Automation Compact GuardLogix 5380 V34.011-V34.014
- Rockwell Automation Compact GuardLogix 5380 V35.011-V35.013
- Rockwell Automation Compact GuardLogix 5380 V36.011-V36.012
Vendor fixes and mitigations (from advisory)
- Vendor Fix: Rockwell Automation recommends users update to firmware version V37.011.
- Vendor Fix: Rockwell Automation recommends users update to firmware version 34.015.
- Vendor Fix: Rockwell Automation recommends users update to firmware version 35.014.
- Vendor Fix: Rockwell Automation recommends users update to firmware version 36.013.
- Mitigation: Customers using the affected software who are not able to upgrade to one of the corrected versions should use Rockwell Automation's security best practices.
Also apply CISA's standard ICS practices: minimize network exposure, keep control networks behind firewalls and isolated from business networks, and use up-to-date secure remote access.
Sources
This page is generated automatically from the CISA advisory text. It is not a substitute for the vendor's guidance; verify affected versions and fixes at the source before making changes to control systems.