CVE-2026-51537
CVSS Score
9.1
EPSS Score
0.2%
EPSS Percentile
8th
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.
| Vendor | n/a |
| Product | n/a |
| Published | Jul 13, 2026 |
| Last Updated | Jul 14, 2026 |
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Affected Versions
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