Denial-of-Service Vulnerability in AT_NA2000 PLC from Nanda Automation Technology
CVE-2025-56234

7.5HIGH

Key Information:

Vendor

Nanda Automation Technology

Status
AT_NA2000
Vendor
CVE Published:
29 September 2025

What is CVE-2025-56234?

The AT_NA2000 PLC from Nanda Automation Technology exhibits a vulnerability in its handling of TCP RST packets. It allows for a wide range of acceptable sequence numbers, deviating from the requirements outlined in RFC5961. As a consequence, attackers can exploit this flaw by sending arbitrary TCP RST packets within the acceptable range. This exploitation can lead to significant interruptions in network connections, resulting in a denial-of-service scenario that disrupts normal operational capabilities.

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References

https://github.com/zq-star/TCP-Vuln-Report/blob/master/PL...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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