CVE-2026-8666Network attack vector

Unauthenticated command execution via unvalidated traceroute parameters

Published Jun 25, 2026 · Updated Jun 25, 2026

OS command injection in Rapid7 InsightConnect Traceroute Plugin before 1.0.3 allows remote attackers to execute Linux commands. The traceroute action inserts the host, port, max_ttl, count, and time_out request values into shell commands without sufficient validation. Network access without authentication is sufficient, and injected commands run with the plugin container's privileges, enabling data access, modification, or service interruption.

CVSS severity7.7
High
EPSS probability1.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Rapid7 InsightConnect Traceroute Plugin before 1.0.3 allows remote attackers to execute Linux commands. The traceroute action inserts the host, port, max_ttl, count, and time_out request values into shell commands without sufficient validation. Network access without authentication is sufficient, and injected commands run with the plugin container's privileges, enabling data access, modification, or service interruption.

The record

CVE
CVE-2026-8666
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Rapid7
Product
InsightConnect Traceroute Plugin
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record 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=0 <1.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rapid7 · InsightConnect Traceroute Pluginversion=0 <1.0.3

Published CVSS scores

7.7Rapid7, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

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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