What is CVE-2026-8666?

CVE-2026-8666 is a high-severity vulnerability in Rapid7 Insightconnect Traceroute Plugin, classified under OS Command Injection. CVSS score: 7.7/10. Published 2026-06-25.

How severe is CVE-2026-8666?

High severity. CVSS v3 base score is 7.7 out of 10.

RCE in Rapid7 Insightconnect Traceroute Plugin

CVE-2026-8666

OS Command Injection vulnerability in the traceroute action of Rapid7 InsightConnect Traceroute Plugin on Linux allows remote attackers to execute arbitrary OS commands via the host, port, max_ttl, count, or time_out request parameters due…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.006 (42.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L.

Affected products

Rapid7 Insightconnect Traceroute Plugin — versions 0, 1.0.3

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve@rapid7.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-8666?: CVE-2026-8666 is a high-severity vulnerability in Rapid7 Insightconnect Traceroute Plugin, classified under OS Command Injection. CVSS score: 7.7/10. Published 2026-06-25.
How severe is CVE-2026-8666?: High severity. CVSS v3 base score is 7.7 out of 10.