Is CVE-2025-66217 actively exploited?

No active exploitation of CVE-2025-66217 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-66217 be exploited remotely?

Yes. CVE-2025-66217 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-66217?

CVE-2025-66217 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2025-66217

CWE-122Published: November 29, 2025· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2025-66217 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.