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Critical ConfigServer Security & Firewall Flaw Lets Remote Attackers Execute Arbitrary Commands

Cyber Press
Cyber Press
Published September 11, 2026Original Report

Excerpt

A critical vulnerability in ConfigServer Security & Firewall (CSF) could allow unauthenticated remote attackers to execute arbitrary commands on vulnerable servers. Tracked as CVE-2026-65638, the flaw affects CSF versions 14.00 through 16.29 and has been resolved in version 16.30 and later. The issue was identified in the MESSENGER service of ConfigServer Security & Firewall, a widely deployed firewall-management solution used on Linux hosting servers and cPanel &…

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Indicators of Compromise

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1 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2026-65638MediumScore 51/100First seen

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