Is CVE-2018-10199 actively exploited?

No active exploitation of CVE-2018-10199 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-10199 be exploited remotely?

Yes. CVE-2018-10199 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-10199?

CVE-2018-10199 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2018-10199

CWE-416Published: April 18, 2018· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In versions of mruby up to and including 1.4.0, a use-after-free vulnerability exists in src/io.c::File#initilialize_copy(). An attacker that can cause Ruby code to be run can possibly use this to execute arbitrary code.

NVD Source

Technical Analysis

CVE-2018-10199 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.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.