Unauthenticated password disclosure via client-side authentication
Published Mar 16, 2020 · Updated Jun 3, 2026
Client-side authentication in Rockwell Automation MicroLogix controllers and RSLogix 500 allows remote attackers to disclose passwords. A controller answers an RSLogix 500 request with password values that the client uses to authenticate, exposing the authentication secret to the requester. No prior authentication or user interaction is required; the documented impact is password disclosure and possible authentication bypass, not data alteration or service interruption.
Summary
What happened
Client-side authentication in Rockwell Automation MicroLogix controllers and RSLogix 500 allows remote attackers to disclose passwords. A controller answers an RSLogix 500 request with password values that the client uses to authenticate, exposing the authentication secret to the requester. No prior authentication or user interaction is required; the documented impact is password disclosure and possible authentication bypass, not data alteration or service interruption.
The record
- CVE
- CVE-2020-6988
- Published
- Mar 16, 2020
- Updated
- Jun 3, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-603, CWE-287
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 16, 2020CVE publishedPublication date reported by the CVE source.
- Jun 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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