Critical severity · published Jun 25, 2026
CVE-2026-8666
OS Command Injection in Rapid7 InsightConnect Traceroute Plugin
9.8
CVSS
1.2%
EPSS
No
On KEV
Description
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 to insufficient input validation when constructing shell commands.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IT
InsightConnect Traceroute Plugin · Rapid7
before 1.0.3 · source: vendor
IT
Insightconnect Traceroute · Rapid7
before 1.0.3 · source: NVD