How severe is CVE-2018-3834?

CVE-2018-3834 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2018-3834 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3834?

CVE-2018-3834 affects Insteon Hub Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3834?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-3834 published?

CVE-2018-3834 was published on 2018-08-02 and last updated on 2026-06-17.

CVE-2018-3834

CVE-2018-3834 is a high-severity vulnerability in Insteon Hub Firmware with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: High (CVSS 3.x base score 7.4)
CVSS v2: 7.8
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Insteon Hub Firmware
Published: 2018-08-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-3834?: 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.
How severe is CVE-2018-3834?: CVE-2018-3834 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2018-3834 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3834?: CVE-2018-3834 affects Insteon Hub Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3834?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-3834 published?: CVE-2018-3834 was published on 2018-08-02 and last updated on 2026-06-17.

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0513

Affected products (1)

cpe:2.3:o:insteon:hub_firmware:1013:*:*:*:*:*:*:*

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