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CVE-2026-51221

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存在安全漏洞，该漏洞源于Get_Attribute_List函数存在缓冲区溢出，可能导致攻击者通过提供特制的Common Packet Format数据包造成拒绝服务。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a n/a n/a affected
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I. Basic Information for CVE-2026-51221

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overflow in the Get_Attribute_List function of EIPStackGroup OpENer commit 76b95c allows attackers to cause a Denial of Service (DoS) via supplying a crafted Common Packet Format (CPF) packet.
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存在安全漏洞，该漏洞源于Get_Attribute_List函数存在缓冲区溢出，可能导致攻击者通过提供特制的Common Packet Format数据包造成拒绝服务。
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-2026-51221

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-51221

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News Coverage for CVE-2026-51221 (1)

Other References for CVE-2026-51221 (1)

Same Patch Batch · n/a · 2026-06-29 · 12 CVEs total

CVE-2026-57919 7.8 HIGH Matrix42 Empirum Personal Backup 权限许可和访问控制问题漏洞
CVE-2026-13540 6.3 MEDIUM GitBucket RepositoryCreationService.scala Git.cloneRepository.setURI server-side request f
CVE-2026-13543 5.6 MEDIUM Documenso Google OAuth Login handle-oauth-callback-url.ts improper authentication
CVE-2026-13529 5.6 MEDIUM YzmCMS index.php sql injection
CVE-2026-13536 4.3 MEDIUM GotoHTTP reg.12x cross site scripting
CVE-2026-13523 3.3 LOW GPAC ISOBMFF base_encoding.c data amplification
CVE-2026-36848 Gigamon GVOS 路径遍历漏洞
CVE-2026-51219 Mz-automation lib60870 安全漏洞
CVE-2026-51218 Dave Nardella Snap7 安全漏洞
CVE-2026-37637 Alex Yashkin PHP File Manager 代码注入漏洞
CVE-2026-31016 Squidex 跨站请求伪造漏洞

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-51221

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