CVE-2017-16276: Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel

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CRITICAL 9.9MITIGATE

CVE-2017-16276 is a critical-severity flaw (CVSS 9.9) affecting hub firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel of Insteon Hub running firmware version 1012. Specially crafted commands sent through the PubNub service can cause a stack-based buffer overflow overwriting arbitrary data. An attacker should send an authenticated HTTP request to trigger this vulnerability. In cmd sn_grp, at 0x9d0175f4, the value for the `gbt` key is copied using `strcpy`

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-121
Published	2023-01-11
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: insteon

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-01-11 22:15 UTCPublished CVE record published
2026-06-17 01:09 UTCUpdated Record last modified

insteon hub firmware MITIGATE

Affected: 1012

Fixed in: no fixed release known

Safe to downgrade to: a release before 1012

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-16276?

hub firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-16276 being exploited?

CVE-2017-16276 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-16276 affect?

CVE-2017-16276 affects hub firmware. Severity is critical (CVSS 9.9). Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel of Insteon Hub running firmware version 1012. Specially crafted commands sent through the PubNub service can cause a stack-based b

How urgent is CVE-2017-16276?

Priority 48/100. Critical severity

Related CVEs

CVE-2017-16336 CRITICAL 9.9 MITIGATE Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel
CVE-2017-16335 CRITICAL 9.9 MITIGATE Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel
CVE-2017-16334 CRITICAL 9.9 MITIGATE Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel
CVE-2017-16333 CRITICAL 9.9 MITIGATE Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel
CVE-2017-16332 CRITICAL 9.9 MITIGATE Multiple exploitable buffer overflow vulnerabilities exist in the PubNub message handler for the "cc" channel

References

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