CVE-2025-56234
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.
Atekon AT_NA2000是中国南大傲拓（Atekon）公司的一款煤矿开关专用可编程控制器。 Atekon AT_NA2000存在安全漏洞，该漏洞源于TCP RST包处理中对序列号范围验证不足，可能导致拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-56234
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
AT_NA2000 from Nanda Automation Technology vendor has a denial-of-service vulnerability. For the processing of TCP RST packets, PLC AT_NA2000 has a wide acceptable range of sequence numbers. It does not require the sequence number to exactly match the next expected sequence value, just to be within the current receive window, which violates RFC5961. This flaw allows attackers to send multiple random TCP RST packets to hit the acceptable range of sequence numbers, thereby interrupting normal connections and causing a denial-of-service attack.
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
Atekon AT_NA2000 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Atekon AT_NA2000是中国南大傲拓（Atekon）公司的一款煤矿开关专用可编程控制器。 Atekon AT_NA2000存在安全漏洞，该漏洞源于TCP RST包处理中对序列号范围验证不足，可能导致拒绝服务攻击。
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 | - |
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II. Public POCs for CVE-2025-56234
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · n/a · 2025-09-29 · 15 CVEs total
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IV. Related Vulnerabilities
V. Comments for CVE-2025-56234
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