Is CVE-2018-3834 actively exploited?

No active exploitation of CVE-2018-3834 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-3834 be exploited remotely?

Yes. CVE-2018-3834 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-3834?

CVE-2018-3834 has a CVSS score of 7.4 (HIGH).

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HIGH

CVE-2018-3834

CWE-346Published: August 2, 2018· Updated: Jun 17, 2026

7.4

CVSS v3.1

Official Description

An exploitable permanent denial of service vulnerability exists in Insteon Hub running firmware version 1013. The firmware upgrade functionality, triggered via PubNub, retrieves signed firmware binaries using plain HTTP requests. The device doesn't check the kind of firmware image that is going to be installed and thus allows for flashing any signed firmware into any MCU. Since the device contains different and incompatible MCUs, flashing one firmware to the wrong MCU will result in a permanent brick condition. To trigger this vulnerability, an attacker needs to impersonate the remote server "cache.insteon.com" and serve a signed firmware image.

NVD Source

Technical Analysis

CVE-2018-3834 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 full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.4.