Is CVE-2026-30618 actively exploited?

No active exploitation of CVE-2026-30618 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-30618 be exploited remotely?

Yes. CVE-2026-30618 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-30618?

CVE-2026-30618 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-30618

Published: July 15, 2026· Updated: Jul 16, 2026

9.8

CVSS v3.1

EPSS:1.67%probability of exploitation in 30 daysPercentile:74.2th

Official Description

xszyou Fay 4.3.1 contains a remote code execution vulnerability in its MCP STDIO server management and command execution handling. A remote attacker can access the publicly exposed MCP management interface and configure an MCP STDIO server with attacker-controlled commands and parameters, resulting in execution of arbitrary commands on the server. Successful exploitation allows arbitrary command execution within the context of the Fay service.

NVD Source

Risk Analysis

This critical remote code execution vulnerability in xszyou Fay 4.3.1 allows remote attackers to execute arbitrary commands on the server. The flaw is in the MCP STDIO server management, where attackers can configure an MCP STDIO server with attacker-controlled commands and parameters. With a CVSS score of 9.8, this vulnerability presents a severe risk of complete system compromise.

No public exploit is currently known for this vulnerability. Its remote exploitability and low attack complexity mean it could be easily exploited if a working exploit emerges.

Recommended Action

Update xszyou Fay to a version beyond 4.3.1 that addresses this vulnerability. Restrict access to the MCP management interface and implement strict input validation for server configurations.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-30618 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.