Vulnerability Intelligence Report
Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers Improper Input Validation
CVE-2020-6998
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.
No Active Exploit Signals
CVSS Base Score
5.8
MEDIUM
Exploitability:3.9
Impact Score:1.5
EPSS Probability:1.74%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-20 ↗CWE-20 Improper Input Validation
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Rockwell Automation | Armor Compact GuardLogix 5370 controllers | unspecified <= versions 33 and prior (affected) |
| Rockwell Automation | Armor GuardLogix Safety Controllers | unspecified <= versions 33 and prior (affected) |
| Rockwell Automation | CompactLogix 5370 L1 controllers | unspecified <= versions 33 and prior (affected) |
| Rockwell Automation | CompactLogix 5370 L2 controllers | unspecified <= versions 33 and prior (affected) |
| Rockwell Automation | CompactLogix 5370 L3 controllers | unspecified <= versions 33 and prior (affected) |
| Rockwell Automation | Compact GuardLogix 5370 controllers | unspecified <= versions 33 and prior (affected) |
| Rockwell Automation | ControlLogix 5570 controllers | unspecified <= versions 33 and prior (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
1.740%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS) · CERT · USA |
| Reserved | 2020-01-14T00:00:00 |
| Published | 2022-07-27T20:18:00 |
| Last Updated | 2025-04-17T15:51:02 |
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