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Critical cPanel Flaw Could Let One Hosting Customer Take Root Control of a Whole Server

The Hacker News
CVEVulnerabilityCritical

Overview

cPanel has issued critical patches for a serious vulnerability identified as CVE-2026-65643, which affects the domain parking and addon domain features in cPanel and WebHost Manager (WHM). This flaw could allow a malicious hosting customer to execute code with root privileges, potentially compromising the entire server. All supported versions of cPanel & WHM are impacted, making it a widespread issue for users of this software. Given the potential for significant damage, including unauthorized access and control over server resources, it is crucial for affected users to apply the patches as soon as possible. Failure to address this vulnerability could lead to severe security breaches within hosting environments.

Key Takeaways

  • Affected Systems: cPanel & WHM (all supported versions)
  • Action Required: cPanel has released patches to address the vulnerability.
  • Timeline: Newly disclosed

Original Article Summary

cPanel has released patches for a security flaw affecting domain parking and addon domain functionality in cPanel and WebHost Manager (WHM), which could allow code execution as the root user. The vulnerability, assigned the CVE identifier CVE-2026-65643, impacts all supported versions of cPanel & WHM. cPanel described the issue as a critical security vulnerability and said that an

Impact

cPanel & WHM (all supported versions)

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

cPanel has released patches to address the vulnerability. Users should update to the latest version of cPanel & WHM as soon as possible to mitigate the risk.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Critical.

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