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CVE-2026-9636

Rockwell Automation CompactLogix® 5380 ControlLogix® 5580 / 1756-EN4 Communications Module – Certificate Revocation List Vulnerability

A security issue exists within CompactLogix® 5380, ControlLogix® 5580, and EN4 communication modules related to CIP Security certificate revocation handling. The security issue stems from the controller failing to properly reject certificates signed by an intermediate certificate that has been revoked via a Certificate Revocation List (CRL). This could allow a network-based attacker to establish a connection using a certificate that should be untrusted, potentially bypassing CIP Security protections.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
CVE-2025-11698

CompactLogix ®, ControlLogix ®, Compact GuardLogix ® and GuardLogix ® Buffer Overflow

A denial-of-service issue exists in 5380/5480/5580 controllers boot firmware lower than version 1.072. This vulnerability could potentially allow a malicious user to write invalid file data to the controller, causing the device to enter a major non-recoverable fault (MNRF).

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
CVE-2021-22681

Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.

CVSS 3.1 · 9.8 Critical EPSS 63.6% KEV · Listed
CVE-2020-6998

Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers Improper Input Validation

The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products.

CVSS 3.1 · 5.8 Medium EPSS 3.2% KEV · Not listed
CVE-2022-1159

Rockwell Automation Studio 5000 Logix Designer Code Injection

Rockwell Automation Studio 5000 Logix Designer (all versions) are vulnerable when an attacker who achieves administrator access on a workstation running Studio 5000 Logix Designer could inject controller code undetectable to a user.

CVSS 3.1 · 7.7 High EPSS 3.5% KEV · Not listed
CVE-2022-1161

ICSA-22-090-05 Rockwell Automation Logix Controllers

An attacker with the ability to modify a user program may change user program code on some ControlLogix, CompactLogix, and GuardLogix Control systems. Studio 5000 Logix Designer writes user-readable program code to a separate location than the executed compiled code, allowing an attacker to change one and not the other.

CVSS 3.1 · 10 Critical EPSS 5.2% KEV · Not listed
CVE-2022-1797

Rockwell Automation Logix Controllers Uncontrolled Resource Consumption

A malformed Class 3 common industrial protocol message with a cached connection can cause a denial-of-service condition in Rockwell Automation Logix Controllers, resulting in a major nonrecoverable fault. If the target device becomes unavailable, a user would have to clear the fault and redownload the user project file to bring the device back online.

CVSS 3.1 · 6.8 Medium EPSS 2.2% KEV · Not listed
CVE-2022-3752

Rockwell Automation GuardLogix and ControlLogix controllers Vulnerable to Denial-Of-Service Attack

An unauthorized user could use a specially crafted sequence of Ethernet/IP messages, combined with heavy traffic loading to cause a denial-of-service condition in Rockwell Automation Logix controllers resulting in a major non-recoverable fault. If the target device becomes unavailable, a user would have to clear the fault and redownload the user project file to bring the device back online and continue normal operation.

CVSS 3.1 · 8.6 High EPSS 1.3% KEV · Not listed
CVE-2024-40619

Rockwell Automation GuardLogix/ControlLogix 5580 Controller denial-of-service Vulnerability via Malformed Packet Handling

CVE-2024-40619 IMPACT A denial-of-service vulnerability exists in the affected products. The vulnerability occurs when a malformed CIP packet is sent over the network to the device and results in a major nonrecoverable fault causing a denial-of-service.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
CVE-2024-5659

Rockwell Automation Multicast Request Causes major nonrecoverable fault on Select Controllers

Rockwell Automation was made aware of a vulnerability that causes all affected controllers on the same network to result in a major nonrecoverable fault(MNRF/Assert). This vulnerability could be exploited by sending abnormal packets to the mDNS port. If exploited, the availability of the device would be compromised.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
CVE-2024-3493

Rockwell Automation ControlLogix and GaurdLogix Vulnerable to Major Nonrecoverable Fault Due to Invalid Header Value

A specific malformed fragmented packet type (fragmented packets may be generated automatically by devices that send large amounts of data) can cause a major nonrecoverable fault (MNRF) Rockwell Automation's ControlLogix 5580, Guard Logix 5580, CompactLogix 5380, and 1756-EN4TR. If exploited, the affected product will become unavailable and require a manual restart to recover it. Additionally, an MNRF could result in a loss of view and/or control of connected devices.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed
CVE-2024-6207

CVE 2021-22681 https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.PN1550.html  and send a specially crafted CIP message to the device. If exploited, a threat actor could help prevent access to the legitimate user and end connections to connected devices including the workstation. To recover the controllers, a download is required which ends any process that the controller is running.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
CVE-2024-8626

Logix Controllers Vulnerable to Denial-of-Service Vulnerability

Due to a memory leak, a denial-of-service vulnerability exists in the Rockwell Automation affected products. A malicious actor could exploit this vulnerability by performing multiple actions on certain web pages of the product causing the affected products to become fully unavailable and require a power cycle to recover.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
CVE-2024-6077

Rockwell Automation ControlLogix/GuardLogix 5580 and CompactLogix/Compact GuardLogix® 5380 Vulnerable to DoS vulnerability via CIP

A denial-of-service vulnerability exists in the Rockwell Automation affected products when specially crafted packets are sent to the CIP Security Object. If exploited the device will become unavailable and require a factory reset to recover.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
CVE-2024-7507

Rockwell Automation ControlLogix/GuardLogix 5580 and CompactLogix/Compact GuardLogix® 5380 Controller Denial-of-Service Vulnerability via Input Validation

CVE-2024-7507 IMPACT A denial-of-service vulnerability exists in the affected products. This vulnerability occurs when a malformed PCCC message is received, causing a fault in the controller.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
CVE-2024-7515

Rockwell Automation ControlLogix/GuardLogix 5580 and CompactLogix/Compact GuardLogix® 5380 Controller Denial-of-Service Vulnerability via Input Validation

CVE-2024-7515 IMPACT A denial-of-service vulnerability exists in the affected products. A malformed PTP management packet can cause a major nonrecoverable fault in the controller.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed