Cyber Resilience

CVE-2026-8658

MediumRCE

Published: 25 June 2026

Published
25 June 2026
Modified
29 June 2026
KEV Added
—
Patch
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CVSS Score v3.1 6.0 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L
EPSS Score 0.0083 53.1th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-8658 is a medium-severity OS Command Injection (CWE-78) vulnerability in Rapid7 Insightconnect Tcpdump. Its CVSS base score is 6.0 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Unix Shell (T1059.004); ranked in the top 46.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

OS Command Injection vulnerability in Rapid7 InsightConnect Tcpdump Plugin on Linux allows authenticated attackers to execute arbitrary OS commands via the options or filter parameters due to insufficient input sanitization in shell command construction.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
Why these techniques?

Direct OS command injection (CWE-78) on Linux enables arbitrary Unix shell command execution via unsanitized parameters.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

rapid7
insightconnect tcpdump
≤ 2.0.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References