OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose path_size field claims that many more path words are present than are actually available. Because the parser trusts the attacker-controlled path_size and continues decoding path segments without a remaining-length boundary, it reads beyond the end of the stack receive buffer.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Eipstackgroup |
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References
History
Mon, 13 Jul 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Eipstackgroup
Eipstackgroup opener |
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| Vendors & Products |
Eipstackgroup
Eipstackgroup opener |
Mon, 13 Jul 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose path_size field claims that many more path words are present than are actually available. Because the parser trusts the attacker-controlled path_size and continues decoding path segments without a remaining-length boundary, it reads beyond the end of the stack receive buffer. | |
| References |
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MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2026-07-13T00:00:00.000Z
Updated: 2026-07-13T21:35:20.055Z
Reserved: 2026-06-08T00:00:00.000Z
Link: CVE-2026-51541
Vulnrichment
No data.
NVD
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Redhat
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