CRITICALVulnerability
CVE-2026-51537
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.
Properties
- severity
- CRITICAL
- score
- 9.1
- cve_id
- CVE-2026-51537
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- published_at
- 2026-07-13T22:16:47.387
- last_modified
- 2026-08-11T16:42:16.093
Related Entities (3)
HAS_WEAKNESS (1)
→[Weakness]Out-of-bounds Read
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
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