Is CVE-2018-3985 actively exploited?

No active exploitation of CVE-2018-3985 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-3985 be exploited remotely?

Yes. CVE-2018-3985 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-3985?

CVE-2018-3985 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2018-3985

CWE-415Published: March 21, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An exploitable double free vulnerability exists in the mdnscap binary of the CUJO Smart Firewall. When parsing mDNS packets, a memory space is freed twice if an invalid query name is encountered, leading to arbitrary code execution in the context of the mdnscap process. An unauthenticated attacker can send an mDNS message to trigger this vulnerability.

NVD Source

Technical Analysis

CVE-2018-3985 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.