Critical cPanel and WHM bug exploited as a zero-day, PoC now available

BleepingComputer

April 30, 2026 at 11:40 AM

Actively Exploited

Overview

A serious authentication bypass vulnerability identified as CVE-2026-41940 has been discovered in cPanel, WHM, and WP Squared. This flaw has been actively exploited by attackers since late February, allowing unauthorized access to systems using these platforms. cPanel and WHM are widely used web hosting control panels, making this issue particularly concerning for hosting providers and website owners. Users of affected systems should take immediate action to secure their environments, as the vulnerability poses a significant risk to sensitive data and system integrity. As proof-of-concept (PoC) code is now available, the potential for widespread exploitation increases, underscoring the urgency for users to address this vulnerability promptly.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: cPanel, WHM, WP Squared
Action Required: Users should apply any available security patches from cPanel and WHM.
Timeline: Ongoing since late February

Original Article Summary

The critical CVE-2026-41940 authentication bypass vulnerability in cPanel, WHM, and WP Squared is being actively exploited in the wild and has been leveraged in attempts since late February. [...]

Impact

cPanel, WHM, WP Squared

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Ongoing since late February

Remediation

Users should apply any available security patches from cPanel and WHM. Additionally, it is recommended to review and strengthen authentication mechanisms and monitor for suspicious activity on affected systems.

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, Zero-day, Vulnerability, and 1 more.

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