Is CVE-2017-3891 actively exploited?

No active exploitation of CVE-2017-3891 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-3891 be exploited remotely?

Partially. CVE-2017-3891 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2017-3891?

CVE-2017-3891 has a CVSS score of 9.6 (CRITICAL).

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CRITICAL

CVE-2017-3891

CWE-923Published: November 14, 2017· Updated: Jun 17, 2026

9.6

CVSS v3.1

Official Description

In BlackBerry QNX Software Development Platform (SDP) 6.6.0, an elevation of privilege vulnerability in the default configuration of the QNX SDP with QNet enabled on networks comprising two or more QNet nodes could allow an attacker to access local and remote files or take ownership of files on other QNX nodes regardless of permissions by executing commands targeting arbitrary nodes from a secondary QNX 6.6.0 QNet node.

NVD Source

Technical Analysis

CVE-2017-3891 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

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 9.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.