CVE-2017-16276Public exploitNetwork attack vector

Authenticated code execution via unchecked gbt copy

Published Jan 11, 2023 · Updated Apr 9, 2025

Stack-based buffer overflow in Insteon Hub 2245-222 firmware 1012 allows remote authenticated users to execute code via PubNub. The sn_grp handler copies the gbt JSON string with strcpy into a 16-byte stack buffer without checking its length. An authenticated PubNub account and a crafted cc-channel message are required; successful exploitation controls the Hub's firmware execution.

CVSS severity8.5
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Insteon Hub 2245-222 firmware 1012 allows remote authenticated users to execute code via PubNub. The sn_grp handler copies the gbt JSON string with strcpy into a 16-byte stack buffer without checking its length. An authenticated PubNub account and a crafted cc-channel message are required; successful exploitation controls the Hub's firmware execution.

The record

CVE
CVE-2017-16276
Published
Jan 11, 2023
Updated
Apr 9, 2025
Vendor
Insteon
Product
Insteon Hub
Classifications
CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Not specified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Insteon · Insteon Hubversion=Not specified

Published CVSS scores

8.5Cisco TalosCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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