How severe is CVE-2018-3833?

CVE-2018-3833 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-3833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3833?

CVE-2018-3833 affects Insteon Hub 2245-222 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3833?

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-2018-3833 published?

CVE-2018-3833 was published on 2018-08-23 and last updated on 2026-06-17.

CVE-2018-3833

CVE-2018-3833 is a high-severity vulnerability in Insteon Hub 2245-222 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Insteon Hub 2245-222 Firmware
Published: 2018-08-23
Last modified: 2026-06-17

Description

An exploitable firmware downgrade 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 firmware version that is going to be installed and thus allows for flashing older firmware images. To trigger this vulnerability, an attacker needs to impersonate the remote server 'cache.insteon.com' and serve any signed firmware image.

Frequently asked questions

What is CVE-2018-3833?: An exploitable firmware downgrade 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 firmware version that is going to be installed and thus allows for flashing older firmware images. To trigger this vulnerability, an attacker needs to impersonate the remote server 'cache.insteon.com' and serve any signed firmware image.
How severe is CVE-2018-3833?: CVE-2018-3833 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-3833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3833?: CVE-2018-3833 affects Insteon Hub 2245-222 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3833?: 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-2018-3833 published?: CVE-2018-3833 was published on 2018-08-23 and last updated on 2026-06-17.

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0512

Affected products (1)

cpe:2.3:o:insteon:hub_2245-222_firmware:1013:*:*:*:*:*:*:*

More vulnerabilities in Insteon Hub 2245-222 Firmware

CVE-2018-3832 — Critical (CVSS 9.0): An exploitable firmware update vulnerability exists in Insteon Hub running firmware version 1013. The HTTP server…
CVE-2017-16337 — High (CVSS 8.8): On Insteon Hub 2245-222 devices with firmware version 1012, specially crafted commands sent through the PubNub service…
CVE-2017-14455 — High (CVSS 8.5): On Insteon Hub 2245-222 devices with firmware version 1012, specially crafted replies received from the PubNub service…
CVE-2017-14453 — High (CVSS 8.5): On Insteon Hub 2245-222 devices with firmware version 1012, specially crafted replies received from the PubNub service…
CVE-2017-14443 — Medium (CVSS 6.5): An exploitable information leak vulnerability exists in Insteon Hub running firmware version 1012. The HTTP server…

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