CVE-2026-51537

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{"bugzilla": {"description": "OpENer: OpENer: Out-of-bounds read via malformed ForwardOpen requests", "id": "2499837", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2499837"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["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.", "A flaw was found in OpENer. An out-of-bounds read vulnerability exists in the Connection Manager when processing malformed ForwardOpen requests. A remote attacker can send a specially crafted Ethernet/IP (ENIP) frame with an insufficient Common Industrial Protocol (CIP) ForwardOpen/LargeForwardOpen request. This can cause the parser to read beyond the intended buffer, potentially leading to a denial of service or information disclosure."], "name": "CVE-2026-51537", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "impact": "important", "package_name": "python3.14", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "impact": "important", "package_name": "rust", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-51537\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-51537\nhttps://gist.github.com/MrAlaskan/a5fb0fb7765c9df80d28220ed558f04e\nhttps://github.com/EIPStackGroup/OpENer/issues/564"], "threat_severity": "Important"}

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