Is CVE-2026-8658 in the CISA KEV catalog?

No. CVE-2026-8658 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8658?

CVE-2026-8658 has a CVSS v3 base score of 6.0 (MEDIUM).

What is the EPSS score for CVE-2026-8658?

CVE-2026-8658 has an EPSS score of 0.83% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8658?

Upgrade insightconnect tcpdump to 2.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-8658

MEDIUM

6.0

CVSS v3

NVD

Description

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-78OS Command Injection

How to fix

Remediation Available

insightconnect tcpdumpNVD

Affected:< 2.0.0Fixed in:2.0.0CVE-2026-8658derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L

Exploit Intelligence

0.83%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Product1

extensions.rapid7.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-29.