Is CVE-2018-3840 actively exploited?

No active exploitation of CVE-2018-3840 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-3840 be exploited remotely?

Yes. CVE-2018-3840 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-3840?

CVE-2018-3840 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2018-3840

CWE-20Published: June 26, 2018· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

A denial-of-service vulnerability exists in the Pixar Renderman IT Display Service 21.6 (0x67). The vulnerability is present in the parsing of a network packet without proper validation of the packet. The data read by the application is not validated, and its use can lead to a null pointer dereference. The IT application is opened by a user and then listens for a connection on port 4001. An attacker can deliver an attack once the application has been opened.

NVD Source

Technical Analysis

CVE-2018-3840 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.