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CVE-2026-51538

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

EIPStackGroup OpENer是EIPStackGroup的一款开源的 EtherNet/IP 协议栈，专为 I/O 适配器设备设计，支持多 I/O 和显式连接，帮助开发者快速构建符合 ODVA 规范的 EtherNet/IP 合规产品。 EIPStackGroup OpENer 2.3.0版本存在安全漏洞，该漏洞源于对封装会话处理时存在访问控制不当问题，当服务器处理关键封装命令时，仅验证提供的session_handle是否存在于全局会话列表中，但未验证该handle是否属于发起请求的特定TC

AI Predicted 8.1 Difficulty: Easy EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a n/a n/a affected
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I. Basic Information for CVE-2026-51538

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided session_handle exists in the global session list, but it fails to verify whether that handle belongs to the specific TCP connection issuing the request. Because there is no strong binding between a session handle and its originating socket, any attacker on the network can use a valid session handle created by another legitimate client to bypass access controls.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
EIPStackGroup OpENer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EIPStackGroup OpENer是EIPStackGroup的一款开源的 EtherNet/IP 协议栈，专为 I/O 适配器设备设计，支持多 I/O 和显式连接，帮助开发者快速构建符合 ODVA 规范的 EtherNet/IP 合规产品。 EIPStackGroup OpENer 2.3.0版本存在安全漏洞，该漏洞源于对封装会话处理时存在访问控制不当问题，当服务器处理关键封装命令时，仅验证提供的session_handle是否存在于全局会话列表中，但未验证该handle是否属于发起请求的特定TC
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2026-51538

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III. Intelligence Information for CVE-2026-51538

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Proof of Concept for CVE-2026-51538 (2)

Same Patch Batch · n/a · 2026-07-13 · 15 CVEs total

CVE-2026-15516 5.6 MEDIUM MacCMS Pro Installation Index.php step5 authorization
CVE-2026-15530 5.3 MEDIUM WuzhiCMS Attachment API index.php listimage information disclosure
CVE-2026-15533 4.7 MEDIUM DedeCMS Column Management search.php code injection
CVE-2026-15605 3.1 LOW wandb Artifact Integrity Validation hashutil.py ArtifactManifestEntry.download weak hash
CVE-2026-26396 OpenBMB XAgent 路径遍历漏洞
CVE-2025-45869 LogicalDOC Enterprise 服务端请求伪造漏洞
CVE-2026-52533 D-Link DIR-1253 安全漏洞
CVE-2026-51539 Stéphane Raimbault libmodbus 安全漏洞
CVE-2026-51536 EIPStackGroup OpENer 安全漏洞
CVE-2026-51821 Shenzhou Shihan Technology Video Conference System 安全漏洞
CVE-2026-51537 EIPStackGroup OpENer 安全漏洞
CVE-2026-51541 EIPStackGroup OpENer 安全漏洞
CVE-2026-51540 EIPStackGroup OpENer 安全漏洞
CVE-2026-39042 MikroTik RouterOS 安全漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2026-51538

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