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CVE-2025-66217

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Date: November 28, 2025

AIS-catcher is a multi-platform AIS receiver. Prior to version 0.64, an integer underflow vulnerability exists in the MQTT parsing logic of AIS-catcher. This vulnerability allows an attacker to trigger a massive Heap Buffer Overflow by sending a malformed MQTT packet with a manipulated Topic Length field. This leads to an immediate Denial of Service (DoS) and, when used as a library, severe Memory Corruption that can be leveraged for Remote Code Execution (RCE). This issue has been patched in version 0.64.

Severity Score

Severity Score

Weakness Type (CWE)

Integer Underflow (Wrap or Wraparound)

CWE-191

Heap-based Buffer Overflow

CWE-122

Top Fix

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Upgrade Version

Upgrade to version https://github.com/jvde-github/AIS-catcher.git - v0.64

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): HIGH

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